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The purpose of the present study was to evaluate the prevalence of early adiposity rebound (EAR) and factors associated with its occurrence in a cohort of extremely low birth weight infants (ELBW). We conducted a retrospective longitudinal study including ELBW infants followed-up for up to 10 years after discharge. EAR was defined as occurring before 5 years of age. A multivariate binary logistic regression analysis was performed to evaluate maternal and perinatal variables independently associated with EAR. Out of 212 ELBW infants included in the analysis, 40.6% developed EAR and 21.5% showed it before 4 years of age. Only formula milk feeding at discharge was independently associated with a higher risk of EAR. The mean BMI of children with EAR was higher than that of children without EAR. Furthermore, the prevalence of overweight and obesity was higher in the EAR group than in the timely AR group.  Conclusions: ELBW infants in our cohort developed EAR in a relatively high percentage of cases. In this already at-risk population, EAR may represent a further risk factor for an adverse metabolic outcome. Monitoring preterm infants' growth within a long-term follow-up program and promoting and supporting human milk feeding is advisable. What is Known: • Preterm-born infants are at high risk for long-term adverse health outcomes, especially cardiovascular and metabolic. • The occurrence of early adiposity rebound (EAR) is associated with the risk of later obesity and metabolic syndrome. What is New: • The occurrence of EAR in ELBW infants may represent an additional risk factor for later adverse metabolic outcomes in an already vulnerable population. • Future preventive strategies should include a long-term follow-up and the promotion of exclusive breastfeeding., (© 2023. The Author(s).)

The purpose of this study is to test the hypothesis that higher consumption of human milk (HM) in preterm infants with birth weight (BW) <1000 g is associated with improved lung function in a dose-dependent manner over the first 2 years of corrected age (CA). This retrospective study at an academic medical center included infants with BW <1000g. They had lung function assessment by the tidal breathing flow-volume loop (TBFVL) follow-up visits at 0-3-, 3-6-, 6-12-, 12-18-, and 18-24-month CA. One hundred eighty infants were included in the study with a mean (SD) gestational age 26.5 (1.90) weeks and BW 772.4 (147.0) g, 50% were female, and 60% developed BPD. 62.8% of infants received HM during the NICU stay. According to a general linear model (including GA, being small for GA (SGA), sex, human milk percentage, sepsis, and BPD), on average, each week of GA resulted in a higher tPTEF/tE of 1.24 (p = 0.039) and being SGA in a lower tPTEF/tE of 5.75 (p = 0.013) at 0-3-month CA. A higher percentage of human milk out of the total enteral intake was associated with better tPTEF/tE z-scores at 0-3 months (p = 0.004) and 18-24 months of CA (p = 0.041). BPD diagnosis was associated with a relevantly worse tPTEF/tE z-score at 6-12 months of CA (p = 0.003)., Conclusion: Preterm infants with higher consumption of HM had significantly less airway obstruction across the first 2 years, suggesting that human milk may contribute in a dose-dependent manner to improve lung function in early childhood in former preterm infants born ELBW., What Is Known: • Human milk feeding reduces the risk of prematurity-related morbidities, including necrotizing enterocolitis, sepsis, lower respiratory tract infections, and BPD. Both exclusive and partial human milk feeding appear to be associated with a lower risk of BPD in preterm infants., What Is New: • This cohort study of 180 preterm infants with birth weight < 1000 g found that exposure to human milk during hospitalization improves airway obstruction markers tPTEF/tE z-score over the first 2 years of corrected age in a dose-dependent manner., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

Although traditionally considered sterile, human milk is currently recognized as an alive ecosystem that harbors not only bacteria, but also viruses, fungi and yeasts, and minor genera, collectively known as the human milk microbiome (HMM). The seeding of HMM is a complex phenomenon whose dynamics are still a matter of research. Many factors contribute to its determination, both maternal, neonatal, environmental, and related to human milk itself. The transmission of microorganisms to the infant through breastfeeding may impact its present and future health, mainly shaping the GI tract microbiome and immune system. The existence and persistence of HMM as a conserved feature among different species may also have an evolutionary meaning, which will become apparent only in evolutionary times., Conclusion: The complexities of HMM warrant further research in order to deepen our knowledge on its origin, determinants, and impact on infants' health. The practical and translational implications of research on HMM (e.g., reconstitution of donor human milk through inoculation of infant's own mother milk, modulation of HMM through maternal dietary supplementation) should not be overlooked., What Is Known: • Human milk harbors a wide variety of microorganisms, ranging from bacteria to viruses, fungi and yeasts, and minor genera. • Human milk microbiome is shaped over time by many factors: maternal, neonatal, environmental, and related to human milk itself. • The transmission of microorganisms through breastfeeding may impact the infant's present and future health., What Is New: • We provide an overview on human milk microbiome, hopefully encouraging physicians to consider it among the other better-known breastfeeding benefits. • Further studies, with standardized and rigorous study designs to enhance accuracy and reproducibility of the results, are needed to deepen our knowledge of the human milk microbiota and its role in newborn and infant's health., (© 2022. The Author(s).)

Fathers are known to impact breastfeeding outcomes. We aimed to explore paternal knowledge and attitude toward breastfeeding, and possible association with breastfeeding rates at discharge. In this cross-sectional study, we enrolled 200 fathers of healthy term neonates. At discharge, fathers were asked to rate their degree of agreement to 12 items on a 5-point Likert scale. A total score was obtained from their answers. Univariate binary logistic regression analysis was used to verify if the total score was predictive of exclusive breastfeeding at discharge. A multivariable logistic regression model was then used to adjust for possible confounders. ROC analysis was performed, and a Youden's total score cut-off value was determined to define total score's performance in predicting exclusive breastfeeding at discharge. Fathers showed a solid knowledge of maternal (87%) and neonatal (98%) benefits of breastfeeding, skin-to-skin (99.5%), rooming-in (79%), and responsive feeding (67.5%); conversely, only 51% knew about the recommended use of pacifiers. Fathers felt personally involved in babies' feeding in 79% of cases. An association was found between total score and exclusive breastfeeding at discharge at univariate (OR: 1.07, p = 0.04) but not at multivariable analysis (OR: 1.07, p = 0.067). ROC analysis was not statistically significant (AUC 0.58, p = 0.083).Conclusion: By using a novel instrument aimed at quantifying fathers' knowledge and overall attitude toward breastfeeding, this study underlines the importance of including fathers in the promotion of breastfeeding. Expanding the classic mother-baby dyad to a more modern mother-father-baby triad may impact breastfeeding outcomes at discharge. What is known: • Social support plays a major role in improving breastfeeding outcomes. • Fathers may greatly influence initiation and duration of breastfeeding; the more they know, the more helpful they can be. What is new: • A multidisciplinary team created a structured questionnaire aimed at quantifying fathers' knowledge and attitude toward breastfeeding. • The association between a higher questionnaire total score and exclusive breastfeeding rates at discharge highlights the importance of including fathers in the promotion of breastfeeding, as part of the breastfeeding team., (© 2021. The Author(s).)

The benefits of human milk in preterm infants, a population at high risk for developing adverse outcomes for which breast milk is a protective factor, are widely acknowledged. However, preterms' admission in a neonatal intensive care unit (NICU) and newborn's clinical conditions have been described as significant barriers, leading to lower rates of breastfeeding initiation and duration. Healthcare workers play a crucial role in encouraging breastfeeding. We conducted a cross-sectional survey among nurses working in six Italian NICUs, exploring their knowledge and attitude towards breastfeeding. Although the majority of nurses had a specific breastfeeding education, our results show still some variations among answers regarding aspects of breastfeeding support in this setting. Specifically, family-centered care, transition feeding to the breast, and skin-to-skin practice, despite being extensively addressed by the Neo Baby-Friendly Hospital Initiative, are the items that highlighted a range of answers that could result in conflicting information to mothers.Conclusion: By underlining the gaps of knowledge and attitude towards breastfeeding of nurses working in NICUs, this study provides an insight into what needs to be improved, with the aim of promoting higher rates of breastfeeding in the preterm population. What is Known: • Breastfeeding is particularly challenging in the preterm population, despite its universally recognized health benefits. • Improving healthcare professionals' knowledge and attitude towards breastfeeding has been shown to be crucial for promoting breastfeeding in NICUs. What is New: • Our results provide useful insight into nurses' knowledge and attitude towards breastfeeding in NICU settings. • By acknowledging strengths and weaknesses highlighted by this study, tailored strategies could be developed to improve health staff breastfeeding education and support to parents in NICU settings.

Unlabelled: Standardised growth indices (Z-scores of weight-for-age, WA, length-for-age, LA, weight-for-length, WL, according to the reference data of the World Health Organization) have been compared for the first 4 months of life among 119 infants born to mothers affected by the type-1 human immunodeficiency virus (HIV). Infants were subdivided according to their HIV serostatus and the clinical expression of the disease. Uninfected status (n = 92), late (>6 months, n = 18) and early (<3 months, n = 9) onset of symptoms among the HIV infected defined three groups. Infants with early symptoms showed the lowest median WA and LA Z-scores at all times and the LA difference with their uninfected counterparts was already significant at birth. Infants with late symptoms showed early differences in WL and then in WA also compared with the uninfected ones. A < -0.40 LA Z-score at birth gave a 5.9 relative risk (RR) to be an infant with early symptoms (95% CI = 1.2-27.4) while a negative WL Z-score at 2 months of age gave a 4.2 RR for the HIV seropositivity (95% CI = 2.1-8.3)., Conclusion: Linear growth is the first parameter to be negatively affected among human immunodeficiency virus seropositive infants with early symptoms. In infants with late symptoms the lack of rapid WA and WL increase found among uninfected patients may be viewed as an early anthropometric indicator of HIV status.