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Background: Pregnant women have a higher risk of severe illness and adverse pregnancy outcomes due to a SARS-CoV-2 infection. COVID-19 vaccination can prevent (severe) infection. Observational studies are needed to ascertain safety of COVID-19 vaccination during pregnancy. Aim: Estimate whether COVID-19 vaccination during pregnancy is associated with the risk of preterm labor (PL). Methods: In this prospective cohort study, we included 5,910 pregnant women (mean age: 33.0 ± 3.7 years) who entered the Dutch Pregnancy Drug Register between February 2021 and August 2022. Information on COVID-19 vaccinations, PL, and confounders were self-reported using web-based questionnaires. The hazard ratio (HR) on PL, comparing those who received ≥1 COVID-19 vaccine during any moment of pregnancy to those who did not, was estimated using survival analyses with vaccination as time-varying exposure. Additionally, we estimated the risk of PL after COVID-19 vaccination prior to pregnancy, and after COVID-19 vaccination during trimester 1, 2, or 3 of pregnancy. Findings: A total of 5,227 (88%) participants received ≥1 COVID-19 vaccine between gestational week 2 and 37. We observed no statistically significant association of COVID-19 vaccination during pregnancy (adjusted HR = 0.93, 95%CI = 0.59; 1.45) nor of COVID-19 vaccination prior to pregnancy (adjusted HR = 1.09, 95%CI = 0.70; 1.71) with the risk of PL. Moreover, we observed no association between the risk of PL and COVID-19 vaccination in any trimester of pregnancy. Discussion: We demonstrated that COVID-19 vaccination prior to or during pregnancy is not associated with an increased risk of PL. Conclusion: These results add to the growing evidence supporting safety of COVID-19 vaccination during pregnancy. [ABSTRACT FROM AUTHOR]

Preterm labor, defined as contractions occurring every 5–10 minutes with cervical changes before the 37th week of estimated gestation, is a significant cause of perinatal mortality. This meta-analysis aims to evaluate the effectiveness and safety of magnesium sulfate compared to nifedipine in managing preterm labor. The systematic review protocol was registered with PROSPERO (CRD42023422419). Manuscripts published up to September 2024 were systematically searched in databases. Dichotomous data were pooled as odds ratios using a random-effects model with the Mantel-Haenszel method, while continuous data were analyzed as mean ± standard deviation values, mean differences, and standardized mean differences using inverse-variance fixed-effects analysis. Fifteen randomized clinical trials (RCTs) were included, enrolling a total of 2,186 pregnant women. Nifedipine showed a greater effect compared to a 4-gram IV dose of magnesium sulfate. However, the efficacy of these tocolytics in prolonging pregnancy by 48 hours did not significantly differ between nifedipine and a 6-gram IV dose of magnesium sulfate. Additionally, magnesium sulfate was associated with more adverse drug reactions. The moderate certainty of evidence found here requires confirmation in large, adequately powered RCTs. [ABSTRACT FROM AUTHOR]

Introduction: Preterm birth, defined as birth before 37 weeks of gestation, is the leading cause of death of children under the age of five years worldwide. Globally there has been no change in the preterm birth rate between 2010 and 2020, when rates were calculated to be 9.8% and 9.9% of all livebirths, respectively. The analysis of amniotic fluid has been advocated by many to identify the mechanisms driving threatened preterm labor. Amniocentesis is largely considered to be safe, but care provider concerns about complications in the setting of threatened preterm labor (tPTL) exist. This systematic review will critically review the data regarding safety and outcomes of amniocentesis in cases of PPROM and tPTL and help in the counseling and clinical decision-making of patients and care providers alike. Methods: This systematic review was conducted in accordance with the preferred reporting items for systematic reviews and meta-analyses (PRISMA). All English language, peer-reviewed human studies where amniocentesis was used to sample the amniotic fluid of patients presenting with tPTL or PPROM and published between January 1990 and March 2022 were included. Data on the uptake rates, success rates, and safety profile associated with amniocentesis in this context of tPTL or PPROM were analyzed as part of the systematic review. Included studies compromised of randomized control trials, cohort studies, and case-control studies. Conference abstracts and abstracts with no full text were excluded. Results: 10,215 studies were returned after searches were conducted in MEDLINE, EMBASE, EMCARE, Web of Science, and SCOPUS databases using free text and Medical Subject Headings (MESH). 399 studies were assessed for eligibility with 15 studies being included in the final review. The main reason for exclusion from the review was an absence of safety data. Four studies gave information on uptake rates of amniocentesis in cases of PPROM and tPTL, with a range of 55% in an observational study to >99% in centers offering it as part of routine care. Eleven studies detailed success rates of amniocentesis, with all centers reporting >90% success rates. However, in some centers, a "successful" amniocentesis was deemed to be a retrieval of >0.5 ml. Three studies reported risks associated with amniocentesis. There were four reported complications (all transitory) in a series of 1119 cases (0.35%). Discussion: This systematic review found that amniocentesis in cases of PPROM or threatened preterm labor is a safe and feasible procedure. These data should give care providers confidence to counsel patients appropriately. [ABSTRACT FROM AUTHOR]

Objective Fetal fibronectin (fFN) testing and transvaginal ultrasound (TVUS) are diagnostic tools used to predict impending spontaneous preterm birth (sPTB) among women presenting with preterm labor (PTL). We evaluated the association between fFN testing or TVUS cervical length (CL) measurement in predicting sPTB, respiratory distress syndrome (RDS), neonatal intensive care unit (NICU) admission, and sPTB-related costs. Study Design We conducted a retrospective cohort study using data from the Kaiser Permanente Southern California electronic health system (January 1, 2009–December 31, 2020) using diagnostic and procedure codes, along with a natural language processing algorithm to identify pregnancies with PTL evaluations. PTL evaluation was defined as having fFN and/or TVUS assessment. Outcomes were ascertained using diagnostic, procedural, and diagnosis-related group codes. Multivariable logistic regression assessed the association between fFN and/or TVUS results and perinatal outcomes. Results Compared with those without PTL evaluations, those with positive fFN tests had higher adjusted odds ratio (adj.OR) for sPTB (2.95, 95% confidence interval [CI]: 2.64, 3.29), RDS (2.34, 95% CI: 2.03, 2.69), and NICU admission (2.24, 95% CI: 2.01, 2.50). In contrast, those who tested negative had lower odds for sPTB (adj.OR: 0.75, 95% CI: 0.70, 0.79), RDS (adj.OR: 0.67, 95% CI: 0.61, 0.73), and NICU admission (adj.OR: 0.74, 95% CI: 0.70, 0.79). Among those with positive fFN results, the odds of sPTB was inversely associated with CL. Health care costs for mothers and neonates were lowest for those with fFN testing only. Conclusion This study demonstrates that positive fFN results were associated with an increased odds of sPTB, RDS, and NICU admission and the association with sPTB was inversely proportional to CL. Additionally, negative fFN results were associated with decreased odds of sPTB, RDS, and NICU admissions. fFN testing may predict these and other sPTB-related adverse outcomes hence its utility should be explored further. Moreover, fFN testing has some cost savings over TVUS. Key Points Patients with positive fFN tests had higher odds of sPTB, RDS, and NICU admission. Inverse relationship between sPTB and CL among those with positive fFN tests was observed. Health care costs for mothers and neonates were lowest for those with fFN testing only. [ABSTRACT FROM AUTHOR]

Problem: Intrauterine infection is one of the most jeopardizing conditions associated with adverse outcomes, including preterm birth; however, multiple tolerance mechanisms operate at the maternal–fetal interface to avoid the rejection of the fetus. Among the factors that maintain the uterus as an immunoprivileged site, Galectin‐1 (Gal‐1), an immunomodulatory glycan‐binding protein secreted by the maternal‐fetal unit, is pivotal in promoting immune cell homeostasis. This work aimed to evaluate the role of Gal‐1 during a lipopolysaccharide (LPS)‐induced‐inflammatory milieu. Method of Study: Using an ex vivo culture with two independent compartments, human fetal membranes at term were pretreated with 40 and 80 ng/mL of Gal‐1, then to reproduce an intraamniotic inflammation, the fetal side of membranes was stimulated with 500 ng/mL of LPS for 24 h. The concentrations of tumor necrosis factor (TNF)‐α, interleukin (IL)‐1β, IL‐6, monocyte chemoattractant protein (MCP1), macrophage inflammatory protein (MIP1) α, regulated upon activation normal T cell expressed and secreted (RANTES), and matrix metalloproteinase (MMP)‐9 were measured in both amnion and choriodecidua compartments. Results: In a tissue‐specific fashion profile, pretreatment with the physiologic concentration of Gal‐1 significantly diminished the LPS‐dependent secretion of TNF‐α, IL‐1β, Il‐6, MCP1, MIP1α, RANTES, and MMP‐9. Conclusion: Gal‐1 elicits an anti‐inflammatory effect on the human fetal membranes stimulated with LPS, which supports the hypothesis that Gal‐1 is part of the immunomodulatory mechanisms intended to stop the harmful effect of inflammation of the maternal–fetal interface. [ABSTRACT FROM AUTHOR]

Streptococcus agalactiae, or Group B Streptococcus (GBS), is a leading cause of neonatal sepsis. Materno-fetal transmission of the microorganisms present in the lower genital tract/perineum is considered to be the most frequent mode for acquisition of infection. It has also been proposed that, in a subset of cases, GBS causes acute chorioamnionitis, intraamniotic infection, and fetal/neonatal sepsis. However, the evidence to support this ascending pathway is derived from microbiologic studies that rely on cultivation methods, which do not have the resolution to determine if the microorganisms causing neonatal sepsis are the same as those found in the amniotic fluid and the vaginal ecosystem. We used whole genome sequencing of the microorganisms isolated from the vagina, amniotic fluid, chorioamniotic membranes, and neonatal blood (four isolates) in a case of early neonatal sepsis. Using hybrid genome assembly, we characterized the genomic features including virulence factors and antimicrobial resistance in four isolates from the same mother, placenta, and newborn. Whole genome sequencing revealed that the microorganisms in the four clinical isolates corresponded to S. agalactiae sequence type 1, clonal complexes 1, and serotype Ib. Comparative genomic analysis illustrated similar DNA sequences of the four genomes. This study presents the first evidence of the genomic similarity of microorganisms in the vaginal ecosystem, the space between the chorioamniotic membranes of the placenta, amniotic fluid, and neonatal blood. [ABSTRACT FROM AUTHOR]

• The presence of CSS is associated with an increased risk of preterm delivery. • The use of ultrasound markers is cost effective and easy to reproduce. • The contribution of CSS to cervical length seems relatively limited. To investigate the contribution of the cervical sliding sign to conventional cervical length measurement in patients at risk of preterm labor. The study, performed as a prospective cohort study, included patients admitted to a tertiary research hospital with a diagnosis of threatened preterm labor. The participants were divided into two groups: those who gave birth before and after 37 weeks of gestation. The clinical and demographic characteristics, cervical length, presence of a short cervix (SC), and cervical sliding sign (CSS) were compared between the groups. Furthermore, correlation and regression analyses were conducted to investigate the relationship between the presence of a SC, the presence of CSS, and the coexistence of these two findings with preterm delivery, as well as the interval between the symptoms and delivery being less than four weeks. The study included 77 patients who delivered prematurely and 65 patients who delivered at term. The following variables were significantly lower in the preterm delivery group: cervical length, gestational age at delivery, neonatal weight, and time between the first examination and delivery (p = 0.003, <0.001, <0.001 and < 0.001, respectively). A higher percentage of women in the preterm delivery group exhibited a diagnosis of a SC, the presence of CSS, and the coexistence of both conditions (p = 0.002, 0.012 and 0.018, respectively). The results of the logistic regression analysis indicated that the odds ratios for preterm delivery were 3.3 in the presence of a SC alone, 2.67 in the presence of CSS alone, and 2.85 in the association of both findings (p = 0.003, 0.013 and 0.021 respectively). The odds ratios for delivery in less than four weeks were 3.08 in the presence of a SC alone, 3.4 in the presence of CSS alone, and 3.54 in the association of both findings (p = 0.004, 0.002 and 0.005 respectively). In singleton pregnant women presenting with threatened preterm labor, the presence of CSS is associated with an increased risk of preterm delivery and a decreased presentation-to-delivery interval. However, its contribution to conventional cervical length measurement appears to be relatively limited. [ABSTRACT FROM AUTHOR]

Objective: Real‐world data on cardiopulmonary events among pregnant women receiving β‐agonist therapy are scarce. In the present study, we aimed to examine the absolute and relative risks of maternal cardiopulmonary events associated with the use of β‐agonist ritodrine during pregnancy. Methods: By linking Taiwan's National Birth Certificate Application Database with National Health Insurance data, 1 831 564 pregnancies at ≥20 weeks' gestation were identified. Age‐standardized incidence rates of cardiopulmonary events among pregnant women exposed to ritodrine were estimated. Nested case–control analyses were conducted to evaluate the relative risk of pulmonary edema, heart failure, and arrhythmia associated with prior ritodrine use. Cases and controls were matched using risk set sampling, and adjusted odds ratios were estimated using conditional logistic regression models. Results: A total of 189 cases of pulmonary edema, 126 cases of heart failure, and 162 cases of arrhythmia were identified (corresponding age‐standardized incidence rates: 20.90, 8.35, and 16.63 per 100 000 among pregnant women only exposed to oral ritodrine; 91.28, 36.01, and 14.61 per 100 000 among those ever exposed to intravenous ritodrine). Exposure to oral ritodrine was associated with a lower increased risk of pulmonary edema (aOR 1.76; 95% CI: 1.12–2.76) and arrhythmia (2.21; 1.47–3.32) whereas exposure to ritodrine injection was associated with a significantly higher risk of pulmonary edema (10.56; 6.39–17.45), arrhythmia (4.15; 1.99–8.64), and heart failure (5.58; 2.27–13.74). Conclusions: Pregnant women receiving intravenous ritodrine therapy had higher cardiopulmonary risks and should be intensively monitored. While the relative risk associated with oral ritodrine is not pronounced, it should be used judiciously among pregnant women as well. Synopsis: Oral ritodrine exposure in pregnancy doubles the risk of pulmonary edema and arrhythmia, while ritodrine injections pose a higher risk—11‐fold for pulmonary edema and four‐ to six‐fold for heart failure/arrhythmia. [ABSTRACT FROM AUTHOR]

This prospective cohort study aimed to evaluate the performance of Flora select™ (FS), a newly developed real-time PCR test, for the assessment of the vaginal microbiome during early pregnancy. Five hundred and fifty-six pregnant women underwent examinations of FS, Nugent score—a Gram-staining scoring system for the diagnosis of bacterial vaginosis (BV)—and conventional bacterial culture between 8 weeks and 12 gestational weeks. Nugent scores of 0–3, 4–6, and ≥7 were found in 469 (84.2%), 41 (7.4%), and 47 (8.5%) of the women, respectively. Relative dominance rates of Lactobacillus species of high (≥80% medium (50%≤, <80%), and low (0.1≤, <50%), and no detection (<0.1%) were 63.0%, 8.8%, 17.1%, and 11.2%, respectively. Gardnerella, Prevotella, Atopobium, Streptococcus, Ureaplasma, and Mycoplasma species were detected in 23.9%, 17.6%, 17.1%, 7.0%, 23.0%, and 4.9% of the women, respectively. Gardnerella species were detected in all women with Nugent scores ≥7 and Ureaplasma were detected in 40.4% of them. BV-associated bacterial species were also detected in 70.7% of women with Nugent scores of 4–6. Gardnerella, Prevotella, Atopobium, Streptococcus, Ureaplasma, and Mycoplasma species were highly prevalent in women with Nugent scores ≥4 or Lactobacillus species <50%. FS detected Gardnerella, Prevotella, and Atopobium species more effectively than conventional bacterial culture. FS could determine relative dominance rates of Lactobacillus species in the vaginal microbiome, and simultaneously detect four kinds of BV-associated bacteria, Ureaplasma and Mycoplasma species. Therefore, FS may be clinically useful for the screening of the vaginal microbiome during pregnancy to prevent preterm birth and for the assessment of the vaginal microbiome after BV treatments. [ABSTRACT FROM AUTHOR]

Background: One of the main reasons for neonatal deaths is preterm delivery, and infants who have survived preterm birth (PB) are at risk of significant health complications. However, an effective method for reliable and accurate prediction of preterm labor has yet to be proposed. Objective: This study proposes an artificial neural network (ANN)-based approach for early prediction of PB, and consequently can hint physicians to start the treatment earlier, reducing the chance of morbidity and mortality in the infant. Material and Methods: This historical cohort study proposes a feed-forward ANN with 7 hidden neurons to predict PB. Thirteen risk factors of PB were collected from 300 pregnant women (150 with preterm delivery and 150 normal) as the ANN inputs from 2018 to 2019. From each group, 70%, 15%, and 15% of the subjects were randomly selected for training, validation, and testing of the model, respectively. Results: The ANN achieved an accuracy of 79.03% for the classification of the subjects into two classes normal and PB. Moreover, a sensitivity of 73.45% and specificity of 84.62% were obtained. The advantage of this approach is that the risk factors used for prediction did not require any lab test and were collected in a questionnaire. Conclusion: The efficacy of the proposed approach for the early identification of pregnant women, who are at high risk of preterm delivery, leads to necessary care and clinical interventions, applied during the pregnancy. [ABSTRACT FROM AUTHOR]

Abstract Preterm birth (PTB) is one of the most common and serious complications of pregnancy, leading to mortality and severe morbidities that can impact lifelong health. PTB could be associated with various maternal medical condition and dental status including periodontitis. The purpose of this study was to identify major predictors of PTB among clinical and dental variables using machine learning methods. Prospective cohort data were obtained from 60 women who delivered singleton births via cesarean section (30 PTB, 30 full-term birth [FTB]). Dependent variables were PTB and spontaneous PTB (SPTB). 15 independent variables (10 clinical and 5 dental factors) were selected for inclusion in the machine learning analysis. Random forest (RF) variable importance was used to identify the major predictors of PTB and SPTB. Shapley additive explanation (SHAP) values were calculated to analyze the directions of the associations between the predictors and PTB/SPTB. Major predictors of PTB identified by RF variable importance included pre-pregnancy body mass index (BMI), modified gingival index (MGI), preeclampsia, decayed missing filled teeth (DMFT) index, and maternal age as in top five rankings. SHAP values revealed positive correlations between PTB/SPTB and its major predictors such as premature rupture of the membranes, pre-pregnancy BMI, maternal age, and MGI. The positive correlations between these predictors and PTB emphasize the need for integrated medical and dental care during pregnancy. Future research should focus on validating these predictors in larger populations and exploring interventions to mitigate these risk factors.

Background: One of the main reasons for neonatal deaths is preterm delivery, and infants who have survived preterm birth (PB) are at risk of significant health complications. However, an effective method for reliable and accurate prediction of preterm labor has yet to be proposed.Objective: This study proposes an artificial neural network (ANN)-based approach for early prediction of PB, and consequently can hint physicians to start the treatment earlier, reducing the chance of morbidity and mortality in the infant.Material and Methods: This historical cohort study proposes a feed-forward ANN with 7 hidden neurons to predict PB. Thirteen risk factors of PB were collected from 300 pregnant women (150 with preterm delivery and 150 normal) as the ANN inputs from 2018 to 2019. From each group, 70%, 15%, and 15% of the subjects were randomly selected for training, validation, and testing of the model, respectively.Results: The ANN achieved an accuracy of 79.03% for the classification of the subjects into two classes normal and PB. Moreover, a sensitivity of 73.45% and specificity of 84.62% were obtained. The advantage of this approach is that the risk factors used for prediction did not require any lab test and were collected in a questionnaire. Conclusion: The efficacy of the proposed approach for the early identification of pregnant women, who are at high risk of preterm delivery, leads to necessary care and clinical interventions, applied during the pregnancy.

Introduction: To investigate whether synthetic (s) glucocorticoids (GCs) administered between the 24th and the 34th gestational weeks in pre-term labor might precipitate labor, studies on sGCs administration were reviewed. The physiology of endogenous glucocorticoid-related increase in fetal–maternal circulation and its association with labor, followed by a scoping review of studies on exogenous sGCs administered for fetal lung maturation and the timing of labor, were included. Materials and methods: The methodology of systematic reviews was followed. MEDLINE, Cochrane Library, and Google Scholar databases were searched until October 2023, for original studies investigating the administration of sGCs in pregnancies risking pre-term labor. Duplicates were removed, and 1867 abstracts were excluded as irrelevant. Six controlled and four non-controlled studies were included. The index group consisted of 6001 subjects and 7691 controls in the former, while in the latter, the index group consisted of 2069 subjects. Results: In three out of the six controlled studies, gestational age at labor was significantly lower in sGC-treated women than in controls, while in three studies, gestational age at labor was lower in sGC-treated women than in controls, with a trend toward statistical significance. In one study, gestational age at labor was significantly lower in controls than in sGC-treated women. In the non-controlled studies, the majority of women delivered less than 1 week from the day of sGC administration. Conclusions: In this scoping review, studies lack homogeneity. However, in the controlled studies, a pattern of earlier labor emerges among sGC-treated pregnant women. The use of multiple courses of antenatal sGCs appears to be associated with precipitated labor. Their use should be carefully weighed. Carefully designed trials should examine this ongoing scientific query.

Background. Undifferentiated connective tissue disease is the subject of research in a large number of medical specialties, as it leads to an aggravated course of various diseases. In the presence of this pathology during pregnancy, the incidence of such complications as preeclampsia, gestational diabetes, and placental abruption increases. Failure to carry a pregnancy to term can be associated with various causes, including the activity of myocytes, while the pathology in question involves the connective tissue of the uterus. In this connection, it seems necessary to study the impact of undifferentiated connective tissue disease on pregnancy outcomes in order to administer timely treatment.Objectives. To assess how undifferentiated connective tissue disease affects the risk of failure to carry a pregnancy to term.Methods. An observational cohort prospective study was conducted among pregnant women who were under antenatal care in 2021–2022. The study was performed at the premises of the Clinical Maternity Hospital of Minsk Region (Republic of Belarus). The patients were divided into two groups: an exposed group comprising 59 patients with diagnosed undifferentiated connective tissue disease and a nonexposed group comprising 59 patients without this pathology. Both groups were divided into subgroups according to the obstetric outcome. The exposed group included a subgroup of 17 undifferentiated connective tissue disease patients who had failed to carry pregnancy to term (miscarriage and preterm labor) and a subgroup of 42 undifferentiated connective tissue disease patients with delivery at term. The nonexposed group included a subgroup of five women without undifferentiated connective tissue disease who had failed to carry pregnancy to term (miscarriage and preterm labor) and a subgroup of 54 women without undifferentiated connective tissue disease and with delivery at term. According to ICD-10, abortive outcomes occurred before 21 weeks and six days gestation; labor that occurred at 22–36 weeks and six days gestation was considered preterm, whereas in the case of delivery at term, the baby was born at 37–41 weeks and six days gestation. The obstetric, gynecological, and somatic history, as well as pregnancy outcomes, were analyzed. Statistical processing of data was performed using the following software: Statistica 12.0 (StatSoft, USA), Microsoft Excel 2016, Epi InfoTM 7.2.6.0 (USA), and MedCalc 15.8 (MedCalc Software, Belgium). In hypothesis testing, differences were considered statistically significant at p < 0.05.Results. In the group of undifferentiated connective tissue disease patients, metrorrhagia was statistically significantly more common than in the patients without undifferentiated connective tissue disease: 18 out of 59 (30.5 %) and six out of 59 (10.2 %), respectively, p = 0.012. The obstetric history revealed no statistically significant intergroup differences, p > 0.05. In the undifferentiated connective tissue disease patients, the following diseases were statistically significantly more common: myopia, spinal scoliosis, lower limb varicose veins, chronic tonsillitis, mitral valve prolapse, and iron deficiency anemia (p < 0.05). The incidence of new cases of failure to carry a pregnancy to term in the cohort during the observation period amounted to 18.6 % for the patients in both groups. The pregnancy ended prematurely in 17 out of the 59 undifferentiated connective tissue disease patients (28.8 %) and in five out of the 59 patients without undifferentiated connective tissue disease (8.5 %), relative risk of 3.4 (95 % CI:1.3–8.6), p = 0.005.Conclusion. Undifferentiated connective tissue disease increases the risk of failure to carry a pregnancy to term by 3.4 times. Timely diagnosis and treatment of undifferentiated connective tissue disease at the stage of preconception preparation can reduce the incidence of failure to carry a pregnancy to term.

The study aimed at identifying the prevalence of preterm labor and the associated risk factors. Design A quantitative approach using a retrospective case-control study. Setting Tertiary care hospital of Udupi district Karnataka. Population or Sample Women delivered in tertiary care Hospital of Udupi district, Karnataka, were the sample; among them, the cases (250) were the records of the women who had delivered before 37 weeks of gestation, and controls (500) were the records of women who delivered after 37 weeks of gestation and without any complications. Method The study was conducted using a retrospective case-control design by reviewing the case records of women who had delivered in a tertiary care hospital. Main Outcome Measures Women delivered in tertiary care Hospital of Udupi district, Karnataka, and their inpatient records were assessed for risk factors during the antenatal and delivery periods. Results The study revealed that the prevalence of preterm labor was 356 (14.86%) Out of 2402 deliveries. Among them, only 250 were assessed. It was significantly correlated with age, place of residence, degree of education, occupation, marital status, gravid para, number of deliveries, type of deliveries, gap between births, blood type, and religion. Pregnant women who had been exposed or had a risk for preterm labor included those who had been diagnosed with pregnancy-induced hypertension, medication during pregnancy, history of abortion, intense physical labor, and conception dates older than 30 years. Conclusion The preterm labor prevalence can be minimized if the modifiable risk factors are in control. Non-modifiable risk factors require keen supervision. Thus, health professionals must be alert to all modifiable and non-modifiable risk factors.

Objective: Coronavirus disease 2019 (COVID-19) is the disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Acute respiratory distress and preterm delivery are the two major complications induced by SARS-CoV-2 infection during pregnancy. In the presence of dyspnea, the use of systemic corticosteroids was recommended in pregnant and non-pregnant groups. Our primary aim was to investigate the effect of early-onset steroid treatment on mortality and adverse effects in pregnant women with COVID-19. Our secondary aim was to investigate the effect of steroid treatment on the length of hospital stay and intensive care unit (ICU) stay, and duration of treatment. The study also investigated infection, preterm birth, and ideal body weight (lbw) in newborns. Methods: In this retrospective study, 253 patients were divided into three groups according to steroid administration. In Group 1 patients (n:112), treatment was started at the time of hospitalization. In Group 2 patients (n:90), treatment was started at least 24 h after hospitalization. Group 3 consisted of patients (n:51) who did not receive steroid treatment. Methylprednisolone (32 mg/day) was given to pregnant patients with a gestational age below 24 weeks or above 34 weeks, and dexametazone (6 mg/day) was given in four doses followed by 32 mg/day methylprednisolone for the others (whose baby was at a gestational age of 24 weeks and above but less than 34 weeks). Result: The hospital stay, ICU stay, and steroid administration time were significantly lower in the Group 1 when compared to the others (p < 0.05). The steroid treatment requirement was 4.4 days in Group 1 and 5.7 days in Group 2 (p < 0.05). While no death was observed in Group 1, one patient died in Group 2 and three patients died in Group 3. There was no difference between the groups in terms of complications, including preterm labor. Conclusions: No death was also observed with early-onset treatment. Early-onset treatment may be beneficial for fewer hospitalizations, fewer ICU stays, and less mechanical ventilation requirement in pregnant women with COVID-19. In addition, with early treatment, the total number of steroid administration days was reduced, which is important in terms of reducing the risk of side effects. [ABSTRACT FROM AUTHOR]

The aim of this study was to compare the efficacy of cervical cerclage with spontaneous follow-up strategy on pregnancy duration and neonatal outcomes in women with visible or prolapsed fetal membranes. Patients who were referred to a single tertiary care centre between 1st January 2017 and 31st December 2022 were included in this comparative, retrospective cohort study. Patients were divided into two groups, those undergoing cerclage and those followed with no-cerclage. The range of pregnancy weeks for cerclage is between 18th and 27+6 weeks. A total of 106 cases were reviewed and nine were excluded. Based on shared decision making, cervical cerclage was performed in 76 patients (78.3 %) and 21 patients (21.6 %) were medically treated in no-cerclage group if there was no early rupture of the fetal membranes. The gestational age at delivery was 29.8 ± 6 [median=30 (19–38)] weeks in the cerclage group and 25.8 ± 2.9 [median=25 (19–32)] weeks in the no-cerclage group (p=0.004). Pregnancy prolongation was significantly longer in the cerclage group compared to the no-cerclage group (55 ± 48.6 days [median=28 (3–138)] vs. 12 ± 17.9 days [median=9 (1–52)]; p<0.001). Take home baby rate was 58/76 (76.3 %) in cerclage group vs. 8/21 (38 %) in no-cerclage group. In the post-24 week cerclage group the absolute risk reduction for pregnancy loss was 50 % (95 % CI=21.7–78.2). Cervical cerclage applied before and after 24 weeks (until 27+6 weeks) increased take home baby rate in women with visible or prolapsed fetal membranes without increasing adverse maternal outcome when compared with no-cerclage group. [ABSTRACT FROM AUTHOR]

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Background: Bacterial vaginosis is a condition with altered vaginal flora with gross hydrogen peroxide-producing Lactobacilli strains decreasing with excessive anaerobe growth. Also, a decrease in vaginal lactic acid content is seen with increased vaginal pH to >4.5 and increased bacterial counts to 100-1000 folds. Aim: The present study was aimed at assessing the correlation between bacterial vaginosis to low birth-weight neonates and puerperal sepsis in females with preterm labor. Methods: The study assessed 450 females admitted to the institute with pre-term labor. In all the subjects demographic data were recorded followed by obstetric history recording including gestational age, parity, and birth weight of the infants. The subjects were then divided into two groups: bacterial vaginosis and no bacterial vaginosis. The association of birth weight to bacterial vaginosis and of bacterial vaginosis to puerperal sepsis was assessed and compared. Results: The study results showed a significantly higher presence of bacterial vaginosis in subjects with normal baby weight group with p=0.001. A significantly higher presence of puerperal sepsis was seen in subjects with bacterial vaginosis compared to the subjects with no bacterial vaginosis with p=0.002. Conclusions: The present study, considering its limitations, concludes that bacterial vaginosis has a high prevalence in subjects with normal baby weight compared to small or large gestational age subjects. The study also concludes that puerperal sepsis has a significantly higher prevalence in subjects with bacterial vaginosis compared to subjects without bacterial vaginosis. [ABSTRACT FROM AUTHOR]

Prevention of pregnancy complications related to the "great obstetrical syndromes" (preeclampsia, fetal growth restriction, spontaneous preterm labor, and stillbirth) is a global research and clinical management priority. These syndromes share many common pathophysiological mechanisms that may contribute to altered placental development and function. The resulting adverse pregnancy outcomes are associated with increased maternal and perinatal morbidity and mortality and increased post-partum risk of cardiometabolic disease. Maternal nutritional and environmental factors are known to play a significant role in altering bidirectional communication between fetal-derived trophoblast cells and maternal decidual cells and contribute to abnormal placentation. As a result, lifestyle-based interventions have increasingly been recommended before, during, and after pregnancy, in order to reduce maternal and perinatal morbidity and mortality and decrease long-term risk. Antenatal screening strategies have been developed following extensive studies in diverse populations. Multivariate preeclampsia screening using a combination of maternal, biophysical, and serum biochemical markers is recommended at 11–14 weeks' gestation and can be performed at the same time as the first-trimester ultrasound and blood tests. Women identified as high-risk can be offered prophylactic low dose aspirin and monitored with angiogenic factor assessment from 22 weeks' gestation, in combination with clinical assessment, serum biochemistry, and ultrasound. Lifestyle factors can be reassessed during counseling related to antenatal screening interventions. The integration of lifestyle interventions, pregnancy screening, and medical management represents a conceptual advance in pregnancy care that has the potential to significantly reduce pregnancy complications and associated later life cardiometabolic adverse outcomes. [ABSTRACT FROM AUTHOR]

Preterm birth is a major public health concern, requiring a deeper understanding of its underlying inflammatory mechanisms and to develop effective therapeutic strategies. This review explores the complex interaction between inflammation and preterm labor, highlighting the pivotal role of the dysregulation of inflammation in triggering premature delivery. The immunological environment of pregnancy, characterized by a fragile balance of immune tolerance and resistance, is disrupted in preterm labor, leading to a pathological inflammatory response. Feto-maternal infections, among other pro-inflammatory stimuli, trigger the activation of toll-like receptors and the production of pro-inflammatory mediators, promoting uterine contractility and cervical ripening. Emerging anti-inflammatory therapeutics offer promising approaches for the prevention of preterm birth by targeting key inflammatory pathways. From TLR-4 antagonists to chemokine and interleukin receptor antagonists, these interventions aim to modulate the inflammatory environment and prevent adverse pregnancy outcomes. In conclusion, a comprehensive understanding of the inflammatory mechanisms leading to preterm labor is crucial for the development of targeted interventions in hope of reducing the incidence of preterm birth and improving neonatal health outcomes. [Display omitted] • Preterm labor pathways are initiated and maintained by inflammation. • Inhibiting the inflammatory response associated to preterm labor with emerging anti-inflammatory therapeutics shows promise in preventing preterm birth. • The collaboration between regulatory institutions, clinicians, advocates, and researchers is necessary to bring awareness to this unmet medical need and to develop effective therapeutics destined to prevent preterm birth. [ABSTRACT FROM AUTHOR]

Introduction: Preterm labor is one of the most important pregnancy problems that cause the majority of infant mortality and morbidity even in advanced societies, and it may be possible to improve the outcome of pregnancy by predicting it. The present study was conducted with aim to evaluate the predictive value of the first and the third trimester maternal mean platelet volume (MPV) for prediction of preterm labor. Methods: This prospective cohort study was performed in 2019-2021 on 400 pregnant women with a gestational age of 9-12 weeks in Akbarabadi Hospital, Tehran. According to the inclusion and exclusion criteria of the study, blood sample was taken to check the mean volume of platelets in the first trimester and again in the gestational age of 26-28 weeks and the mothers were monitored up to delivery. At the end, the incidence of preterm delivery was determined and the mean volume of platelets (MPV) in the first and third trimesters of pregnancy were investigated and compared in two groups of preterm delivery and term delivery. In order to determine the accuracy, the ROC curve was drawn and the area under the curve was calculated. P<0.05 was considered significant. Results: Out of 400 studied women, 365 finished the study and were evaluated, and 96 women (26.3%) had preterm labor. MPV of the first trimester did not show significant difference between the two groups of preterm delivery and natural delivery (9.68±1.09 vs 9.57±1.14, p= 0.430). Also, MPV of the third trimester was not significantly different between the two groups of preterm delivery and natural delivery (9.62±1.12 vs 9.46±1.19, p= 0.251). The ROC curve was used to determine the accuracy of mean platelet volume in order to diagnose preterm delivery that considering to the area under the ROC curve as 0.50, it showed no predictive value for preterm labor. Conclusion: The MPV cannot be considered as a suitable index for prediction of preterm labor. [ABSTRACT FROM AUTHOR]

Preterm delivery is associated with perinatal outcomes such as neonatal complications and deaths. Uterine contraction suppressants are administered to treat. In Japan, ritodrine hydrochloride (ritodrine) and magnesium sulfate (magnesium) are covered by insurance. However, ritodrine was withdrawn from the United States market in 2011, and in Europe, its administration was only limited for short-term use in 2013. In this study, we analyzed in the use of ritodrine and magnesium using the NDB Open Data Japan and annual trends in the number of births issued by the Ministry of Health, Labor, and Welfare for 2019-2021. Ritodrine prescribed per birth decreased from 2019 to 2020, while the level 2021 was the same as 2020. Magnesium decreased between 2019 and 2021. The ages were administered ranged from 15-49 years. The results of this study suggest that ritodrine and magnesium are still frequently used in Japan for the treatment of preterm labor. Recently, the American College of Obstetricians and Gynecologists advocated the use of calcium antagonists such as nifedipine as the first choice. We extracted trends in the use of nifedipine, in the target age group for the treatment of imminent preterm labor. The number of nifedipine prescriptions increased every year. However, nifedipine has no indication for the treatment of imminent preterm labor in Japan, it should be noted that this is not accounting for the treatment of impending preterm labor because the prescriptions were classified as vasodilators in the NDB Open Data. [ABSTRACT FROM AUTHOR]

Preterm premature rupture of membranes (pPROM) before 22–24 weeks of gestation is considered previable and poses a high risk to the chances of successful delivery. Multicystic dysplastic kidney (MCDK) is the most common form of dysplasia of this organ, usually affecting 1 kidney. A prenatal suspicion of MCDK requires escalation of the clinical process to a reference center qualified and equipped for further diagnosis and treatment. We present a unique case of prenatal pPROM at 19 weeks of gestation in a pregnancy complicated by fetal MCDK as an interesting obstetric and neonatal patient story. We have not found any published evidence on the impact of coexisting fetal congenital malformations on a pregnancy affected by previable pPROM. The aim of this study is to highlight the importance of a multidisciplinary team approach in the management of previable pPROM and the difficulties of decision-making involving both health professionals and the mother. Initially, medical management focuses on the safety of the mother, and as the fetus reaches viability, the focus shifts to the high standard of care for the child. The final successful outcome and follow-up was the effect of coordinated prenatal and postnatal medical care. [ABSTRACT FROM AUTHOR]

Purpose: To determine whether various inflammatory-, angiogenic/anti-angiogenic-, and extracellular matrix remodeling-associated proteins in plasma, alone or in combination with conventional blood-based markers, can predict intra-amniotic inflammation and/or microbial invasion of the amniotic cavity (IAI/MIAC) in women with spontaneous preterm labor (PTL). Methods: A total of 193 singleton pregnant women with PTL (23–33 weeks) were included in this retrospective cohort study. Plasma samples were obtained at the time of amniocentesis. Amniotic fluid (AF) was cultured for microorganism detection and consequent MIAC diagnosis. IL-6 levels were determined in AF and used to identify IAI (AF IL-6 ≥ 2.6 ng/mL). Endostatin, haptoglobin, IGFBP-2/3, LBP, M-CSF, MMP-2/8, pentraxin 3, PlGF, S100A8/A9, and VEGFR-1 levels were assayed in plasma samples by ELISA. CRP levels and neutrophil-to-lymphocyte ratio (NLR) were measured. Results: Plasma LBP, MMP-8, and S100A8/A9 levels, CRP levels, and NLR were significantly higher, and plasma IGFBP-2 and MMP-2 levels were significantly lower in women with IAI/MIAC than in those without this condition, whereas no baseline variables differed significantly between the two groups. Using a stepwise regression analysis, a noninvasive prediction model for IAI/MIAC was developed, which included plasma LBP, MMP-2, and MMP-8 levels (area under the curve [AUC], 0.785). The AUC for this prediction model was significantly or borderline greater than that of any single factor included in the model. Conclusions: IGFBP-2, LBP, MMP-2, MMP-8, and S100A8/A9 may represent valuable plasma biomarkers for predicting IAI/MIAC in women with PTL. Combination of LBP, MMP-2, and MMP-8 expression data can significantly improve the predictive potential for IAI/MIAC. [ABSTRACT FROM AUTHOR]

Objective: To investigate the role of inflammatory markers, including neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), and monocyte to lymphocyte ratio (MLR), c‐reactive protein (CRP) to albumin ratio (CAR), fibrinogen to albumin ratio (FAR), and fibrinogen to CRP ratio (FCR) in predicting the latency period (≤72 vs. >72 hours) before preterm birth. Materials and Methods: In a retrospective study, we assessed 135 patients meeting the specified criteria with signs of preterm labor (<34 weeks). The patients were categorized into two groups: 71 patients giving birth within 72 h (latency ≤ 72 h) and 64 patients giving birth after 72 h (latency > 72 h). We examined the demographic and medical characteristics and perinatal outcomes of all participants. Categorical variables between groups were compared using the Chi‐square test. The Student's t‐test was utilized for normally distributed continuous variables, and the Mann–Whitney U test was applied for non‐normally distributed data. Receiver operating characteristic (ROC) curve analysis was conducted to identify the optimal cut‐off levels for inflammatory markers in predicting the latency period before birth. Results: Among the parameters examined, significant differences were observed between the groups only in terms of CAR and FCR. While CAR showed a significantly higher value in the group with latency period ≤72 h (0.537 ± 1.239 vs. 0.247 ± 0.325, p = 0.022), FCR showed a significantly lower value in the group with latency period ≤72 h (63.58 (2.99–1165) vs. 88.93 (9.35–1165), p = 0.013). The identified cut‐off value for CAR was 0.190, providing a sensitivity of 57.7% and a specificity of 56.3% (p = 0.022). The cut‐off value for FCR was 71.67, with a sensitivity of 42.3% and a specificity of 42.2% (p = 0.013). Conclusions: The CAR and the FCR, serving as predictive markers for preterm labor, may offer a simple, cost‐effective, and easily accessible approach, particularly in resource‐limited settings. [ABSTRACT FROM AUTHOR]

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Preterm labor is a severe health concern among expectant mothers, affecting approximately 5 % to 7 % of all pregnancies worldwide, and is associated with various factors, including genes, peripheral blood, and immunological functions. In our study, we examined the role of familial genetics in preterm labor to address knowledge gaps and provide more evidence on the concept. We searched the GEO database for applicable genes and found that the GSE26315 and GSE73685 series were relevant. We then performed an analysis using the GEO2R, GEPIA2, STRING, and KEGG enrichment pathways. Our findings are consistent with the literature regarding the association between preterm birth and familial genetics, peripheral blood, and interleukin-1. Interleukin-1 exploits immunological functions by inducing uterine inflammation, creating an unfavorable environment for fetal survival. Similarly, peripheral blood induces premature labor, with higher levels in the amniotic fluid indicating a higher rate of preterm birth. Inheritance of the familial genes responsible for preterm birth passes down the trait.

BackgroundPreterm birth is the leading cause of infant morbidity and mortality worldwide. Elevated levels of oxidative stress have been associated with an increased risk of delivering before term. However, most studies testing this hypothesis have been conducted in racially and demographically homogenous study populations, which do not reflect the diversity within the United States.ObjectiveWe leveraged 4 cohorts participating in the Environmental Influences on Child Health Outcomes Program to conduct the largest study to date examining biomarkers of oxidative stress and preterm birth (N=1916). Furthermore, we hypothesized that elevated oxidative stress would be associated with higher odds of preterm birth, particularly preterm birth of spontaneous origin.Study designThis study was a pooled analysis and meta-analysis of 4 birth cohorts spanning multiple geographic regions in the mainland United States and Puerto Rico (208 preterm births and 1708 full-term births). Of note, 8-iso-prostaglandin-F2α, 2,3-dinor-5,6-dihydro-8-iso-prostaglandin-F2α (F2-IsoP-M; the major 8-iso-prostaglandin-F2α metabolite), and prostaglandin-F2α were measured in urine samples obtained during the second and third trimesters of pregnancy. Logistic regression was used to calculate adjusted odds ratios and 95% confidence intervals for the associations between averaged biomarker concentrations for each participant and all preterm births, spontaneous preterm births, nonspontaneous preterm births (births of medically indicated or unknown origin), and categories of preterm birth (early, moderate, and late). Individual oxidative stress biomarkers were examined in separate models.ResultsApproximately 11% of our analytical sample was born before term. Relative to full-term births, an interquartile range increase in averaged concentrations of F2-IsoP-M was associated with higher odds of all preterm births (odds ratio, 1.29; 95% confidence interval, 1.11-1.51), with a stronger association observed for spontaneous preterm birth (odds ratio, 1.47; 95% confidence interval, 1.16-1.90). An interquartile range increase in averaged concentrations of 8-iso-prostaglandin-F2α was similarly associated with higher odds of all preterm births (odds ratio, 1.19; 95% confidence interval, 0.94-1.50). The results from our meta-analysis were similar to those from the pooled combined cohort analysis.ConclusionHere, oxidative stress, as measured by 8-iso-prostaglandin-F2α, F2-IsoP-M, and prostaglandin-F2α in urine, was associated with increased odds of preterm birth, particularly preterm birth of spontaneous origin and delivery before 34 completed weeks of gestation.

Background and Objective: Preterm birth is one of the leading causes of death and disability in neonates. In recent years, progestins have been used to prevent preterm labor. This study aimed to compare the effects of micronized progesterone (Utrogestan) and hydroxyprogesterone caproate (Proloton) on maternal and fetal blood circulation in women at risk of premature delivery. Materials and Methods: This randomized, single-blind clinical trial study was conducted on 80 pregnant women at 20-34 weeks who were at risk of preterm labor. At first, Doppler ultrasound of the uterine, umbilical, and mid-cerebral arteries was performed. Subsequently, patients were randomly allocated in two groups receiving oral progesterone (200 mg of Utrogestan twice daily) for 48 hours and intramuscular progesterone (500 mg of Proluton). After one week, ultrasonography was repeated in both groups, and pulsatile index (PI), resistance index (RI), peak systolic velocity (PSV), and systolic to diastolic ratio (S/D) were measured. Results: The two groups were similar in terms of age, body mass index, gestational age, gravida, history of preterm labor, cervical length, and initial cervical dilatation. The decrease in uterine artery RI and S/D was greater after Proloton administration than Utrogestan (P

Abstract Background Undernutrition refers to an overall deficiency of nutrients due to an inadequate intake of a well-balanced diet. Undernourishment during pregnancy is an important contributor to maternal morbidity and mortality. It remains a persistent problem in developing countries, where women usually fall behind men in having access to food, health care, and education. Despite the high prevalence of maternal undernourishment, its direct impact on obstetric outcomes has not been studied in developing countries, including Ethiopia. Objective This study aimed to assess the effect of maternal undernutrition on adverse obstetric outcomes in Gedeo zone public hospitals. Method A cohort study design was employed in Gedeo zone public hospitals from June 30, 2022, to February 28, 2023. This study included 721 pregnant women, 237 were exposed group whereas 484 were non-exposed. A systematic random sampling technique was used to select a non-exposed group and the exposed group was selected consecutively. Both groups were followed for 7 months, from 16 weeks of gestation to 24 h of delivery. The pretested interviewer-administered questionnaire and checklist were used. EpiData 4.4.1.2.version was used for data entry and analyzed using Stata version 16 software. A modified Poisson regression model with robust standard errors was used to determine relative risk, and the statistical association was declared at a p-value ≤ 0.05. Finally, the findings were reported in figures, tables, and words. Result The incidence of adverse obstetrics outcomes among undernourished and normally nourished mothers was hypertensive disorder during pregnancy (HDDP) (7.49% vs. 3.19%), antepartum haemorrhage (7.49% vs. 3.19%), obstructed labor (1.53% vs. 3.49%), premature rupture of the membrane (2.5% vs. 3.33%), preterm labor (6.52% vs. 6.93%), instrumental vaginal delivery (1.8% vs. 4.3%), postpartum haemorrhage (5.95% vs. 3.88%), and sepsis (3.74% vs. 1.94%). The risk of adverse obstetric outcomes among undernourished women was hypertensive disorder during pregnancy (HDDP) (aRR) = 4.07, 95%CI: 2.53–6.55), antepartum haemorrhage (APH) (aRR = 5.0, 95% CI: 2.08–12.72), preterm labor (aRR = 1.8, 95%CI: 1.23–2.62), operative delivery (aRR = 1.24, 95%C: 0.87–1.78), postpartum haemorrhage (aRR = 3.02, 95%CI: 1.91–4.79), and sepsis/chrioaminitis (aRR = 3.55, 95%CI: 1.83–6.89) times higher than normally nourished women. Conclusion The incidence rates of hypertensive disorder during pregnancy (HDDP), antepartum haemorrhage, postpartum haemorrhage, and sepsis were higher among undernourished women than normally nourished women. Undernourished women during pregnancy have an increased risk of adverse obstetrics outcomes including hypertensive disorder during pregnancy, antepartum, preterm labor, operative delivery, postpartum haemorrhage, and sepsis/chorioamnionitis.

Although mice normally enter labor when their ovaries stop producing progesterone (luteolysis), parturition can also be triggered in this species through uterus-intrinsic pathways potentially analogous to the ones that trigger parturition in humans. Such pathways, however, remain largely undefined in both species. Here, we report that mice deficient in innate type 2 immunity experienced profound parturition delays when manipulated endocrinologically to circumvent luteolysis, thus obliging them to enter labor through uterus-intrinsic pathways. We found that these pathways were in part driven by the alarmin IL-33 produced by uterine interstitial fibroblasts. We also implicated important roles for uterine group 2 innate lymphoid cells, which demonstrated IL-33-dependent activation prior to labor onset, and eosinophils, which displayed evidence of elevated turnover in the prepartum uterus. These findings reveal a role for innate type 2 immunity in controlling the timing of labor onset through a cascade potentially relevant to human parturition.

Purpose: To analyze the perinatal and maternal outcomes of women ranging in age from 40 to 45 years who gave birth after in vitro fertilization or oocyte donation, compared to spontaneous conception. Methods: This retrospective cohort study used electronic data from a national healthcare service from 2000 through 2019. Three groups were compared: spontaneous pregnancy (SC), in vitro fertilization (IVF) utilizing autologous oocytes, and pregnancies resulting from oocyte donation (OD). The primary study outcomes were preterm labor (PTL) before 37 weeks of gestation, and infants classified as small for gestational age (SGA). Results: The cohort included 26,379 SC, 2237 IVF pregnancies, and 300 OD pregnancies for women ages 40–45 years at delivery. Women with OD or IVF had a higher incidence of PTL < 37 weeks compared to women with SC (19.7% vs. 18% vs. 6.9%, p = 0.001), PTL < 34 (7% vs. 4.5% vs. 1.4%, p = 0.001), PTL < 32 (3.7 vs. 2.1 vs. 0.6, p = 0.001). A multivariable logistic regression for PTL < 37 weeks demonstrated that age (OR = 1.18) and hypertensive diseases (OR = 3.4) were statistically significant factors. The OD group had a lower rate of SGA compared to SC (1% vs. 4.3%, p = 0.001), while the IVF group had a higher rate of SGA compared to SC (9.1% vs. 4.3%, p = 0.001). Hypertensive diseases in pregnancy were significantly higher among the OD group and the IVF group compared to SP pregnancies (3.3% vs. 1%, p = 0.002; 2.3% vs. 1%, p = 0.001, respectively). Conclusions: Women ages 40–45 undergoing IVF or OD have a greater risk of PTL, possibly due to higher rates of hypertensive disorders of pregnancy. [ABSTRACT FROM AUTHOR]

The use of indomethacin to delay delivery in preterm labor (PTL) is widely accepted; however, the optimal dosage of indomethacin in pregnancy is unknown. Here, we perform population pharmacokinetic (PK) and pharmacodynamic (PD) analyses, characterize the plasma disposition of indomethacin in pregnant women with PTL, and relate indomethacin exposure to delayed delivery and maternal/neonatal safety. We analyzed plasma and urine samples collected from a multicenter, prospective, opportunistic PK/PD study of indomethacin in pregnant women 12‐32 weeks gestation admitted with PTL. Ninety‐four participants with 639 plasma concentrations for indomethacin were included in the analysis. The final population PK (popPK) model for indomethacin was a 2‐compartment structural model with first‐order absorption and elimination and a covariate effect of body mass index on apparent oral clearance. We observed a 21%‐60% increase in apparent oral clearance observed during pregnancy. There was no clear association between indomethacin exposure and maternal or neonatal safety outcomes, or with the magnitude of delayed delivery; however, 96.7% of women treated with indomethacin had a delivery that was delayed at least 48 hours. Given the changes to indomethacin apparent oral clearance during pregnancy, and the lack of relationship between indomethacin exposure and safety, dose‐finding studies of indomethacin in pregnant women with PTL may help clarify the most safe and efficacious dosage and duration of indomethacin. [ABSTRACT FROM AUTHOR]

Objective: To determine the effect of genital hygiene behavior (GHB) and vaginal douching (VD) of pregnant women on preterm labor (PTL). Methods: This study, which was conducted with 365 pregnant women, is a cross‐sectional study. Data were collected using a questionnaire and the Genital Hygiene Behavior Inventory (GHBI) was applied. Results: The ratios of PTL diagnosis and VD practice, and mean GHBI scores of the pregnant women were 35.1%, 9.6%, and 64.42 ± 10.44, respectively. The prevalence of receiving a diagnosis of PTL was significantly higher in those who changed their underwear two to three times a week, took baths while sitting, cleansed their perineum with water using their hands, removed pubic hair at intervals of 2 months or longer, and performed VD. It was found that poor GHB and VD practices increased the rate of PTL and, in particular, VD was found to increase the risk of PTL around eight‐fold. Conclusion: These results can help pregnant women to understand the relationship between genital hygiene and PTL and show the importance of being educated by health professionals about this issue. Synopsis: It was found that poor genital hygiene and vaginal douching (VD) practices increased the rate of preterm labor (PTL) and, in particular, VD was found to increase the risk of PTL around eight‐fold. [ABSTRACT FROM AUTHOR]

To observe the clinical outcome of rescue cervical tray therapy in treating patients with further cervical shortening and/or cervical opening after emergency cervical cerclage. Patients who underwent emergency cervical cerclage in the Department of Obstetrics of the First Affiliated Hospital of Harbin Medical University from 31 May 2021 to 13 January 2022, with postoperative ultrasonographic monitoring of cervical length, internal diagnosis, and rescue cervical tray treatment were performed in patients with ultrasonographic indications of shortening of cervix and/or dilatation of uterine opening, and dilatation of the cervical canal with exposure of the fetus cysts (singleton fetus) by transvaginal examination (11 cases). Their pregnancy outcome and adverse effects were followed up. Gestational weeks for emergency cervical cerclage were 107-201 days (mean 165.5±34.9 days); gestational weeks for rescue cervical tray placement were 169-262 days (mean 205.9±26.1); gestational weeks for delivery were 193-269 days (mean 249.5±24.9 days); and prolonged days ranged from 18-160 days (mean 84.0±46.3 days). There was no medically induced premature rupture of membranes or chorioamnionitis. 10 out of 11 patients obtained newborns. Four of the surviving 10 neonates were admitted to the neonatal unit and all were successfully discharged at a later stage, giving a neonatal survival rate of 100%. The use of rescue cervical supports significantly prolonged gestational weeks and improved pregnancy outcomes in patients with shortened cervix and/or dilated uterine opening after emergency cervical cerclage in this group of cases.. [ABSTRACT FROM AUTHOR]

Problem: Preterm birth (PTB) is a leading cause of infant mortality and morbidity. The pathogenesis of PTB is complex and involves many factors, including socioeconomy, inflammation and infection. Asymmetric dimethylarginine, ADMA and symmetric dimethylarginine, SDMA are involved in labor as inhibitors of nitric oxide, a known relaxant of the uterine smooth muscles. Arginines are scarcely studied in relation to PTB and we aimed to investigate arginines (ADMA, SDMA and L‐arginine) in women with spontaneous PTB and term birth. Methods of the Study: The study was based on data from the population‐based, prospective cohort BASIC study conducted in Uppsala County, Sweden, between September 2009 and November 2018. Arginines were analyzed by Ultra‐High Performance Liquid Chromatography using plasma samples taken at the onset of labor from women with spontaneous PTB (n = 34) and term birth (n = 45). We also analyzed the inflammation markers CRP, TNF‐R1 and TNF‐R2 and GDF‐15. Results: Women with spontaneous PTB had higher plasma levels of ADMA (p < 0.001), and L‐Arginine (p = 0.03). In addition, inflammation marker, TNF‐R1 (p = 0.01) was higher in spontaneous PTB compared to term birth. Further, in spontaneous PTB, no significant correlations could be observed when comparing levels of arginines with inflammation markers, except ADMA versus CRP. Conclusions: These findings provide novel evidence for the potential involvement of arginines in the pathogenesis of spontaneous PTB and it seems that arginine levels at labor vary independently of several inflammatory markers. Further research is warranted to investigate the potential of arginines as therapeutic targets in the prevention and management of spontaneous PTB. [ABSTRACT FROM AUTHOR]

Significance: Preterm birth is defined as a birth before 37 weeks of gestation and is one of the leading contributors to infant mortality rates globally. Premature birth can lead to life-long developmental impairment for the child. Unfortunately, there is a significant lack of tools to diagnose preterm birth risk, which limits patient care and the development of new therapies. Aim: To develop a speculum-free, portable preterm imaging system (PPRIM) for cervical imaging; testing of the PPRIM system to resolve polarization properties of birefringent samples; and testing of the PPRIM under an IRB on healthy, nonpregnant volunteers for visualization and polarization analysis of cervical images. Approach: The PPRIM can perform 4 x 3 Mueller-matrix imaging to characterize the remodeling of the uterine cervix during pregnancy. The PPRIM is built with a polarized imaging probe and a flexible insertable sheath made with a compatible flexible rubber-like material to maximize comfort and ease of use. Results: The PPRIM device is developed to meet specific design specifications as a speculum-free, portable, and comfortable imaging system with polarized imaging capabilities. This system comprises a main imaging component and a flexible silicone inserter. The inserter is designed to maximize comfort and usability for the patient. The PPRIM shows high-resolution imaging capabilities at the 20 mm working distance and 25 mm circular field of view. The PPRIM demonstrates the ability to resolve birefringent sample orientation and full field capture of a healthy, nonpregnant cervix. Conclusion: The development of the PPRIM aims to improve access to the standard of care for women's reproductive health using polarized Mueller-matrix imaging of the cervix and reduce infant and maternal mortality rates and better quality of life. [ABSTRACT FROM AUTHOR]

Purpose: The fetal membranes are essential for the maintenance of pregnancy, and their integrity until parturition is critical for both fetal and maternal health. Preterm premature rupture of the membranes (pPROM) is known to be an indicator of preterm birth, but the underlying architectural and mechanical changes that lead to fetal membrane failure are not yet fully understood. The aim of this study was to gain new insights into the anatomy of the fetal membrane and to establish a tissue processing and staining protocol suitable for future prospective cohort studies. Methods: In this proof of principle study, we collected fetal membranes from women undergoing vaginal delivery or cesarean section. Small membrane sections were then fixed, stained for nucleic acids, actin, and collagen using fluorescent probes, and subsequently imaged in three dimensions using a spinning disk confocal microscope. Results: Four fetal membranes of different types were successfully processed and imaged after establishing a suitable protocol. Cellular and nuclear outlines are clearly visible in all cases, especially in the uppermost membrane layer. Focal membrane (micro) fractures could be identified in several samples. Conclusion: The presented method proves to be well suited to determine whether and how the occurrence of membrane (micro) fractures and cellular jamming correlate with the timing of membrane rupture and the mode of delivery. In future measurements, this method could be combined with mechanical probing techniques to compare optical and mechanical sample information. [ABSTRACT FROM AUTHOR]

Background: Chorangioma are benign vascular tumors of the placenta that are nontrophoblastic in nature. The clinical importance of these tumors correlates with their size, with chorangioma larger than 4 cm being linked to complications for both the mother and the fetus. Case description: We present a rare case of 20-year-old primigravida female patient who presented to us at 35 weeks of gestation with a positive sickling test history and pain in the abdomen. Ultrasound showed a single live fetus with polyhydramnios, and a distinct hypoechoic lesion adjacent to the umbilical cord insertion site along the subchorionic plane of the placenta, suggestive of a chorangioma. Histopathological examination confirmed the placental chorangioma. The uniqueness of this case report lies in the presence of a hypoplastic left transverse sinus and sigmoid sinus following delivery without any fetal complications. However, such accidental diagnoses may cause a lot of complications during and after childbirth. Conclusion: It is crucial to implement routine and timely antenatal care to detect and manage potential complications effectively. [ABSTRACT FROM AUTHOR]

Background: The wide uterocervical angle (UCA) has been identified as a predictor of preterm delivery, and the goal of this study is to see how accurate UCA is at predicting spontaneous preterm birth in the second trimester. The aim of study is early prediction of preterm labor by uterocervical angle measurement using transvaginal sonography (TVS) in the second trimester of women at low risk for spontaneous preterm birth (SPB). Methods: This is a prospective cohort study including seventy pregnant women in the second trimester (16-28weeks). They were classified into to preterm (group 1) and term (group 2) according to delivery of 28 and 42 women in each group, respectively. TVS was performed for all participants with measuring UCA. Results: This study shows that all ultrasonographic parameters showed the mean UCA was 124.74±19.69 and 85.95±8.32 degrees in preterm and fullterm delivery, respectively, it had statistically highly significant difference (p <0.001). Conclusions: An elevated risk of spontaneous preterm birth was linked to a wide UCA found during the second trimester. The uterocervical angle may be utilised as a screening tool for spontaneous preterm birth, according to this study. [ABSTRACT FROM AUTHOR]

Objective We aimed to evaluate the correlation and agreement of interleukin (IL)-8 and matrix metalloproteinases (MMP-9) levels between cervicovaginal (CVF) and amniotic fluids (AF) in women with preterm labor (PTL) and to determine the clinical values of these proteins in CVF compared with those in AF. Study Design We designed a retrospective cohort study of 85 singleton pregnant women with PTL at 23 to 34 weeks, who underwent amniocentesis. The AF was cultured, and CVF samples were collected at the time of amniocentesis. Paired AF and CVF samples were assayed for IL-8 and MMP-9 by enzyme-linked immunoassay (ELISA) in duplicate on a single plate, using similar dilution ratios. Results A significant but weak correlation was found for IL-8 levels between AF and CVF (r = 0.333), while no correlation was found for MMP-9 levels between AF and CVF (r = −0.039). Intra-class correlation coefficient for the agreement of IL-8 levels between CVF and AF was 0.4335 and −0.279 for MMP-9, indicating a poor-to-fair level of agreement between the two measured values, respectively. IL-8 and MMP-9 levels in CVF were not associated with the risk of either microbial invasion of the amniotic cavity (MIAC) or spontaneous preterm delivery (SPTD) within 7 days, whereas those in AF provided good-to-excellent predictive values for these two outcomes (area under the curve [AUCs]: 0.82–0.95). AUCs for IL-8 and MMP-9 were significantly larger using AF rather than using CVF for the prediction of MIAC and SPTD. Conclusion In women with PTL, IL-8 and MMP-9 levels in CVF do not precisely reflect the levels of the corresponding proteins in AF. IL-8 and MMP-9 levels in CVF had poor predictive values for the risk of MIAC and SPTD and were significantly inferior to those in AF. Key Points IL-8 and MMP-9 levels in CVF do not precisely reflect levels of the corresponding proteins in AF. Diagnostic accuracy of IL-8 and MMP-9 in CVF alone is not sufficient to predict MIAC and SPTD. IL-8 and MMP-9 levels in AF provide good-to-excellent predictive values for these two outcomes. [ABSTRACT FROM AUTHOR]

Objective The objective of this study was to survey national utilization of cervical length (CL) ultrasound on labor and delivery (L&D) for the evaluation of preterm labor (PTL) and identify provider attitudes and barriers to utilization. Study Design Survey was emailed to Obstetrics and Gynecology Residency and Maternal-Fetal Medicine Fellowship program and advertised via links on obstetric-related Facebook interest groups. The survey was open from August 4, 2020 to January 4, 2021. Characteristics between respondents who did and did not report the use of CL ultrasound for PTL evaluation were compared with chi-square analysis. Results There were 214 respondents across 42 states. One hundred and thirty-four respondents (63%) reported any use of CL in the evaluation of PTL and eighty (37%) denied it. There was a significant difference in practice location, practice type, delivery volume, and region between those who did and did not utilize CL ultrasound on L&D. Those who did use CL ultrasound were more likely to report no barriers to use (40 vs. 4%, p < 0.001). The most common barriers involved the availability of transvaginal ultrasound (31%), sterilization of transvaginal ultrasound probe (32%), limited availability of persons able to perform/interpret CL imaging (38%). Nineteen percent believed CL ultrasound had little/no utility in clinical practice. Those who did not use CL ultrasound in the evaluation of PTL were significantly more likely to report the feeling that there was little/no utility of CL ultrasound in clinical practice (37 vs. 7%, p < 0.001) and to report transvaginal ultrasound availability as barriers to use (63 vs. 12%, p < 0.001). Conclusion CL ultrasound is used nationally in PTL evaluation. However, significant barriers limit widespread adoption. These barriers can be addressed through the dissemination of information and practice guidelines, addition of CL ultrasound education in residency training and through CME opportunities after training, and providing support/resources/access for those looking to add this tool to their practice environment. Key Points In a national survey, 63% of obstetricians endorsed any use of cervical length (CL) ultrasound for preterm labor evaluation on labor and delivery. The most common barriers involved the availability of transvaginal ultrasound (31%), sterilization of transvaginal ultrasound probe (32%), limited availability of persons able to perform/interpret CL imaging (38%). Those who did not use CL ultrasound in the evaluation of PTL were significantly more likely to report the feeling that there was little/no utility of CL ultrasound in clinical practice and to report transvaginal ultrasound availability as barriers to utilization. Barriers to utilization of CL ultrasound for preterm labor evaluation can be addressed through practice guidelines, ultrasound education, and support for equipment/training necessary for use. [ABSTRACT FROM AUTHOR]

Extracellular vehicles (EVs) have been involved in several aspects of pregnancy, including endometrial receptivity, embryo implantation, and embryo-maternal communication showing them associated with pregnancy disorders, such as preeclampsia, gestational diabetes mellitus, and preterm birth. Further research is warranted to fully comprehend the exact pathophysiological roles of EVs and to develop new therapies targeting EVs thereby improving pregnancy outcomes. Herein, we review the recent knowledge on the multifaceted roles of EVs during pregnancy and address the majority of the molecular interactions between EVs, maternal, and fetal cells with an emphasis on disorders of pregnancy under the influence of EVs. Moreover, we also discuss its applications in clinical trials followed by prospects. [ABSTRACT FROM AUTHOR]

Background: Undernutrition refers to an overall deficiency of nutrients due to an inadequate intake of a well-balanced diet. Undernourishment during pregnancy is an important contributor to maternal morbidity and mortality. It remains a persistent problem in developing countries, where women usually fall behind men in having access to food, health care, and education. Despite the high prevalence of maternal undernourishment, its direct impact on obstetric outcomes has not been studied in developing countries, including Ethiopia. Objective: This study aimed to assess the effect of maternal undernutrition on adverse obstetric outcomes in Gedeo zone public hospitals. Method: A cohort study design was employed in Gedeo zone public hospitals from June 30, 2022, to February 28, 2023. This study included 721 pregnant women, 237 were exposed group whereas 484 were non-exposed. A systematic random sampling technique was used to select a non-exposed group and the exposed group was selected consecutively. Both groups were followed for 7 months, from 16 weeks of gestation to 24 h of delivery. The pretested interviewer-administered questionnaire and checklist were used. EpiData 4.4.1.2.version was used for data entry and analyzed using Stata version 16 software. A modified Poisson regression model with robust standard errors was used to determine relative risk, and the statistical association was declared at a p-value ≤ 0.05. Finally, the findings were reported in figures, tables, and words. Result: The incidence of adverse obstetrics outcomes among undernourished and normally nourished mothers was hypertensive disorder during pregnancy (HDDP) (7.49% vs. 3.19%), antepartum haemorrhage (7.49% vs. 3.19%), obstructed labor (1.53% vs. 3.49%), premature rupture of the membrane (2.5% vs. 3.33%), preterm labor (6.52% vs. 6.93%), instrumental vaginal delivery (1.8% vs. 4.3%), postpartum haemorrhage (5.95% vs. 3.88%), and sepsis (3.74% vs. 1.94%). The risk of adverse obstetric outcomes among undernourished women was hypertensive disorder during pregnancy (HDDP) (aRR) = 4.07, 95%CI: 2.53–6.55), antepartum haemorrhage (APH) (aRR = 5.0, 95% CI: 2.08–12.72), preterm labor (aRR = 1.8, 95%CI: 1.23–2.62), operative delivery (aRR = 1.24, 95%C: 0.87–1.78), postpartum haemorrhage (aRR = 3.02, 95%CI: 1.91–4.79), and sepsis/chrioaminitis (aRR = 3.55, 95%CI: 1.83–6.89) times higher than normally nourished women. Conclusion: The incidence rates of hypertensive disorder during pregnancy (HDDP), antepartum haemorrhage, postpartum haemorrhage, and sepsis were higher among undernourished women than normally nourished women. Undernourished women during pregnancy have an increased risk of adverse obstetrics outcomes including hypertensive disorder during pregnancy, antepartum, preterm labor, operative delivery, postpartum haemorrhage, and sepsis/chorioamnionitis. [ABSTRACT FROM AUTHOR]

Objective In the setting of a growing obese obstetric population, we sought to determine whether differences in body mass index (BMI) and obesity class influenced both serum magnesium levels and the likelihood of achieving therapeutic levels for eclampsia prophylaxis after standard boluses of magnesium sulfate. Study Design This is a retrospective cohort study of patients treated with magnesium sulfate in the setting of either preeclampsia with severe features or preterm labor between 2010 and 2016. Subjects were categorized by BMI: Normal (BMI < 30 kg/m 2), Class 1 (BMI 30–34.9 kg/m 2), Class 2 (BMI 35–39.9 kg/m 2), and Class 3 (BMI ≥ 40 kg/m 2). Study participants' demographics, intrapartum characteristics, and adverse reactions were compared among the groups. Logistic regression models were used to calculate unadjusted and adjusted odds ratios comparing the likelihood of each BMI class reaching therapeutic eclamptic prophylactic levels. Linear regression models were also evaluated to determine the relationship between BMI and post-bolus serum magnesium levels. Results Of the 760 people who met the inclusion criteria, 313 (41.1%) had normal BMI, 190 (25.0%) had Class 1 obesity, 135 (17.8%) had Class 2 obesity, and 122 (16.1%) had Class 3 obesity. When adjusted for confounders, those with Class 1 obesity were 54% less likely to achieve serum levels deemed therapeutic for seizure prophylaxis compared with normal BMI counterparts. Meanwhile, those with Class 2 or 3 obesity were 90% less likely. Linear regression models also demonstrated an inverse association between BMI and post-bolus serum magnesium levels. Conclusion Increasing BMI has a significant effect on post-bolus serum magnesium levels regardless of standard loading dose used. Immediately after bolus administration, obese gravidas are significantly less likely to reach levels effective for eclamptic seizure prophylaxis. When considering which bolus to administer in an obese gravida, it may be more beneficial to choose a 6 g load. Key Points BMI has an inverse relationship with post-bolus serum magnesium levels. Obese gravidas were less likely to reach eclampsia prophylaxis levels regardless of bolus type. Obesity class, not just the presence or absence of obesity, plays a role in serum magnesium levels. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was the evaluation of total oxidant status (TOS), total antioxidant status (TAS), oxidative stress index (OSI) and superoxide dismutase (SOD) levels in women with threatened preterm labor (TPL) and also to compare the levels of these oxidative stress biomarkers of TPL pregnancies that had preterm and term deliveries. Methods: This case–control study was conducted on 46 patients diagnosed with TPL and 47 healthy pregnant women matched for gestational age. Patients with threatened preterm labor were divided into two groups: true preterm birth (TPB) group (n = 16) and false preterm birth (FPB) group (n = 30) groups. Maternal serum SOD, TOS and TAS levels were measured by a spectrophotometric method using a commertial kit. OSI level for each patient was calculated by using the formula: (TOS (μmol·H2O2·equiv/L) × 100)/(TAS (μmol·Trolox·equiv/L)). Results: The mean TAS levels of the TPB and FPB groups were significantly lower than those of the control group (0.96 ± 0.3 vs 1.36 ± 0.34, p1 < 0.001; 0.97 ± 0.22 vs 1.36 ± 0.34, p2 < 0.001, respectively). The mean SOD, TOS and OSI levels of the TPB and FPB groups were significantly higher than those of the control group (p < 0.001). There was no significant difference between the TPB and FPB groups for any oxidative stress biomarkers. Conclusion: The maternal serum oxidative stress biomarkers are increased in pregnancies with TPL. However, these are not effective in predicting preterm birth in pregnancies with TPL. [ABSTRACT FROM AUTHOR]