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ABSTRACT Objective: To evaluate the intra and inter observer agreement of the Sauvegrain, Greulich and Pyle methods. Material and methods: This is an observational, retrospective and cross-sectional study ethically approved by opinion 6,192,391. 100 radiographic images of the elbow and 100 of the left wrist and hand were collected from children whose images were selected by a researcher who did not carry out the evaluations. The Sauvegrain, Greulich and Pyle methods were used to determine bone age. We provided a detailed explanation of each method and the evaluators received a file with the study images. After three weeks, the exams were randomized and the radiograms were reevaluated. Of the 100 patients in group A, 61 (61%) were boys and 39 (39%) were girls. In group B, 67 (67%) were boys and 33 (33%) were girls. Four statistical analyzes were used: correlation; intraclass correlation; analysis using the Bland-Altman graph; differences between groups. Results: Intra and interobserver agreement between groups was considered excellent. Conclusions: Despite the excellent agreement, group A presented a significantly better value than B. Biological ages show a greater difference compared to chronological ages in group A. In group B, skeletal and chronological ages do not show statistical difference according to the accuracy test. Level of Evidence III, Cross-Sectional Observational Study.

Management practices during the rearing of dairy heifers should allow an adequate body growth and reproductive development to attain puberty several months before the first conception. Proposed target age and body weight (BW) at first calving for Holstein heifers are between 22-24 months and 82% of mature BW, respectively, for which heifers must conceive at around 15 months of age with 60% of their mature BW. Pre- and postweaning feeding level has effects on feed efficiency, behavior, energy metabolism and body and reproductive development, while social environment during rearing, specifically the social dominance and social regroupings, is known to affect energy metabolism, feeding behavior and body and reproductive development of the heifer. In Uruguay, the information published regarding the management of the dairy heifer is scarce. The aim of this review is to briefly assess the main factors affecting the onset of puberty, and to present an integrative approach of the information generated in Uruguay regarding the effects of modifying the feeding level and social environment during the rearing period on body development, metabolism, and onset of puberty in dairy heifers. In addition, we make a proposal of knowledge gaps that should be addressed in future studies.

Abstract Objectives: This study aims to correlate pelvic ultrasound with female puberty and evaluate the usual ultrasound parameters as diagnostic tests for the onset of puberty and, in particular, a less studied parameter: the Doppler evaluation of the uterine arteries. Methods: Cross-sectional study with girls aged from one to less than eighteen years old, with normal pubertal development, who underwent pelvic ultrasound examination from November 2020 to December 2021. The presence of thelarche was the clinical criterion to distinguish pubescent from non-pubescent girls. The sonographic parameters were evaluated using the ROC curve and the cutoff point defined through the Youden index (J). Results: 60 girls were included in the study. Uterine volume ≥ 2.45mL had a sensitivity of 93%, specificity of 90%, PPV of 90%, NPV of 93% and accuracy of 91% (AUC 0.972) for predicting the onset of puberty. Mean ovarian volume ≥ 1.48mL had a sensitivity of 96%, specificity of 90%, PPV of 90%, NPV of 97% and accuracy of 93% (AUC 0.966). Mean PI ≤ 2.75 had 100% sensitivity, 48% specificity, 62% PPV, 100% NPV and 72% accuracy (AUC 0.756) for predicting the onset of puberty. Conclusion: Pelvic ultrasound proved to be an excellent tool for female pubertal assessment and uterine and ovarian volume, the best ultrasound parameters for detecting the onset of puberty. The PI of the uterine arteries, in this study, although useful in the pubertal evaluation, showed lower accuracy in relation to the uterine and ovarian volume.

ABSTRACT This study aimed to investigate the profile of AMH serum concentrations during the period of prepuberty in young bulls. The bulls were selected and evaluated for 150 days to assess their sexual development. The semen and blood collection, body weight (kg), and scrotal measurements were performed every 30 days, and puberty (D0) was considered when at least 50×106 spermatozoa/mL, and 10% of progressive motility were verified for the first time. After the blood collection, plasma was separated and used to determine the AMH concentration by ELISA, presenting values of 611.4a (±94.5), 555a (±181.99), 621.6ab (±133.44), 370.4ab (±59.36) and 51.7b (±7.94) for moments of -60, -30, 0, +30 and +60 of puberty, respectively. During the evaluated period, there was a progressive increase in body weight (kg), scrotal circumference (cm), and semen characteristics. The AMH mean plasma concentration decreased 60 days after puberty onset. There was no correlation with the andrological parameters analyzed; however, there was a positive and strong correlation between the testicular height and width at puberty onset with plasma concentrations of AMH. We concluded that AMH is not a helpful tool for the early prediction of puberty in Nelore bulls.

Objective: To estimate the serum levels of non-radiologic biomarkers, Insulin-like Growth Factor-1 (IGF-1), and Insulin-like Growth Factor Binding Protein-3 (IGFBP-3) to potentially identify the pubertal growth spurt in skeletal Class II malocclusion subjects. Material and Methods: Eighty subjects (M-38, F-42) with skeletal Class II malocclusion in the age range of 11-18 years were recruited for the cross-sectional study. Human serum IGF-1 and IGFBP-3 were quantitatively assessed by enzyme-linked immunosorbent assay, and the cervical stage (CS) was evaluated from a lateral cephalogram. Results: Gender-wise comparison of the mean serum IGF-1 levels revealed that the initial peak was detected at CS2 in both genders, [males (87.87 ng/mL), females (78.49 ng/mL)]. However, there was a cognizable difference in the second peak of the mean serum IGF-1 levels between males (CS5, 68.58 ng/mL) and females (CS4, 74.63 ng/mL). Mean IGFBP-3 serum levels in male subjects were high in CS4 (47.24 ng/mL) with a further spike in CS6 (50.54 ng/mL), and in female subjects, it was found to be highest in CS3 (51.95 ng/mL) and then in CS5 (49.68 ng/mL). Conclusion: Mean IGF-1 levels exhibited both sexes' prepubertal and late pubertal spikes. Mean IGFBP-3 levels revealed a pubertal and a late pubertal spike in both sexes, with an earlier growth trend observed specific to females compared to males.

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ABSTRACT Objective: The aim of this in-vivo study was to assess the salivary dehydroepiandrosterone sulphate (DHEAS) and cortisol levels, and their correlation to the Cervical Vertebrae Maturation method (CVM) in males and females at pre-pubertal, pubertal and post-pubertal growth stages. Methods: 48 patients (24 males, 24 females) who were to undergo routine orthodontic treatment were screened according to the inclusion and exclusion criteria. Then subjects were grouped according to CVM stages, using lateral cephalogram, in pre-pubertal, pubertal and post-pubertal groups. Unstimulated saliva from the selected subjects was collected. DHEAS and cortisol levels in the salivary samples were estimated by Enzyme-Linked Immunosorbent assay (ELISA). Then they were compared to Cervical Vertebrae Maturation Method stages. One-way ANOVA test followed by Tukey’s post-hoc test was used to compare the salivary DHEAS and cortisol levels between different CVM stages in males and females. Independent Student t-test was used to compare the mean salivary DHEAS and cortisol levels between different males and females in each CVM stage. Result: There was a progressive increase in salivary DHEAS and cortisol concentration as skeletal maturation progressed from CVM stages 1 and 2, CVM stages 3 and 4, reaching the highest value at CVM stages 5 and 6. Their levels were higher in males than females. Conclusion: The salivary DHEAS and cortisol levels can be useful as a potential indicator of skeletal maturation, to aid in the assessment of pubertal status.

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ABSTRACT Prepubertal Nelore (G-N = 15) and crossbred Nelore x Aberdeen Angus heifers (G-NA = 15) were used for this study. AFC, live weight, body condition score (BCS), ovary and dominant follicle (DF) diameters were determined in each animal. Puberty induction was performed by insertion of a 4th use progesterone device (D0) which was removed on D12. Also, 1 mg estradiol benzoate was administered, and estrus intensity was classified (D12). At D21, the presence and diameter of the corpus luteum (CL) were registered. AFC was highly repeatable, regardless of hormone induction in both G-N (r=0.79) and G-NA (r=0.90). The mean AFC was greater in G-N compared to G-NA (24.2±8.5 vs. 17.7±9.0 follicles). A variation in BCS throughout the study occurred in G-NA, but not in G-N. The average weight gain (AWG) was greater in G-NA compared to G-N (0.69±0.33 vs. 0.40±0.29kg/day). The G-NA resulted in a larger diameter of DF at D12 than G-N (11.6±2.7 vs. 9.3±1.5mm). In conclusion, AFC was greater in Nelore heifers, although in both breeds this count was highly repeatable during puberty induction. Crossbred heifers had greater BCS and AWG with greater diameter of DF, indicating higher precocity when compared to Nelore heifers.

Abstract Objective The aim of the present study is to explain the barriers to puberty talk between mothers and daughters. Methods In the present study, the conventional content analysis method was used. The present study was conducted from September 2018 to August 2019 in Iran. The study population consisted of mothers and adolescent girls. The data was collected using purposeful sampling method. The sample consisted of 4 mothers and 6 girls that were interviewed using semistructured interviews. Data collection continued until data saturation was achieved. Data analysis was conducted as described by Graneheimet al. using NVivo 11 software. Results In the present study, after exploring the views of the participants about barriers to puberty talk between mothers and daughters, one dominant theme emerged. Puberty talk is seen as an “inappropriate talk with a girl.” There were several subthemes, including “lack of mother’s awareness regarding the school role, the busy schedule of the mother, and the adoption of alternatives to mother’s talk with girls”. Conclusions Different sociocultural factors affect puberty talk between mothers and adolescent girls. It is important thatmothers and policymakers take these barriers intoaccount.

BACKGROUND: Maturation is a biological process that influences the sport performance of young athletes. OBJECTIVE: The aim was to characterize the somatic maturation of young swimmers and the relationship with sports performance. METHODS: 252 swimmers of both sexes (14.7±1.1 years) who competed in a state championship participated. During the competition, body mass, height, sitting height, experience and performance (technical index) were measured. Maturation was evaluated by the predicted age of peak height velocity (PHV), estimated by maturity offset (MO) method. RESULTS: The classification of the maturational stage into delayed, on-time and advanced was 4.6%, 80.8% and 14.6% (males) and 25.2%, 73.7% and 1.1% (females), respectively. MO was positively correlated with technical index in males (r=0.57; p<0.001) and in females (r=0.30; p=0.003). Advanced swimmers presented better technical index when compared to on-time (627±96 vs. 578±98 points; p=0.04) and late swimmers (627±96 vs. 489±73 points, p=0.003), respectively. In females, no statistically significant differences were observed. CONCLUSION: It is concluded that somatic maturation positively influences performance in young male swimmers. [ABSTRACT FROM AUTHOR]

The objective of this study was to identify sexually precocious heifers by observing ovulation (presence of corpus luteum - CL) and correlating it with the plasma progesterone concentration, as well as to verify the accuracy of the ultrasound examination (US) in this class of animals. The animals were kept in Brachiaria brizantha pastures in an extensive system with water and mineralized salt ad libitum. Nelore heifers (n=50) with initial age and weight of 10 months old and 210 kg, respectively, were used. Only 14% (7/50; p 0.05) of the heifers entered puberty at up to 12 months of age. Regarding the accuracy of the US in relation to the plasmatic concentration of P4 we verified that both the animals with and without CL presented concentrations of P4 inconsistent with the expected. The means of the plasmatic concentrations of P4 in pubertal heifers were superior (p0.05) in both second and third ultrasonographic exams (1.30 ± 0.14 and 1.74 ± 0.22 ng/mL, respectively), when compared to the non-pubertal heifers (0.53 ± 0.08, 0.89 ± 0.04 ng/mL, respectively). In conclusion, the herd presented low sexual precocity and the accuracy of the ultrasound examination in this class of animals was relatively low.

The objective of this study was to determine the ability of prostaglandin E2 (PGE2) to induce ovulation and expression of PGE2 receptor (EP2 and EP4) and COX genes (COX-1 and COX-2) in the ovary and pituitary of prepubertal mice. The positive control consisted of the application of 5 μg of gonadotropin-releasing hormone (GnRH, n = 29); the negative control applied 0.5 mL of phosphate buffered saline (PBS, n=31); the treatment tested the application of 250 μg of PGE2 (n = 29), making a total of 89 prepubertal mice (BALB/c). Mice were euthanized 14 to 15 h after treatments to detect ovulation and tissue collection. A Chi-square test was used to compare the proportion of animals ovulating. Gene expressions and number of ovulation were analyzed by one-way ANOVA and Tukey’s test was used to compare means among groups. A greater proportion of mice (P < 0.001) ovulated after receiving GnRH (89.7%, 26/29) compared to PGE2 group (58.6%, 17/29). However, the proportion was higher compared to those treated with PBS (0%, 0/31). Ep2 gene expression in the pituitary was > two-fold higher (P < 0.05) in the PGE2 group compared to the PBS and GnRH groups. Further, PGE2 stimulated Cox1 (2.7 fold, P < 0.05) while GnRH stimulated Cox2 expression (6.5 fold, P < 0.05) in the pituitary when compared to the PBS group. In conclusion, our results support the hypothesis that PGE2 can induce ovulation in prepubertal mice with a concomitant increase in Ep2 and Cox1 gene expression in the pituitary gland.

ABSTRACT: Brazilian Association of Crioulo Horse Breeders (ABCCC) establishes minimal and maximal body biometrics evaluation; although, nothing is mentioned about testicular measurements. Body and testicular growth are associated and related to age. We described data regarding body and testicular biometry of Crioulo stallions, with a comparative study between young and adult categories. Evaluation was performed in 56 stallions, Crioulo breed, split in: youngsters (3 and 4 years-old, n=16) and adults (above 5 years-old, n=40). Body biometry included weight, height, cannon bone and chest circumference, body score condition and neck fat accumulation. Testicular biometry included height, length, width, volume, combined volume and daily sperm output (DSO). Statistical analyses included descriptive statistic, Pearson correlation, comparison between means by Kruskal Wallis, being P < 0.05 considered significant. There was no significant difference between the parameters of body and testicular biometrics between categories young and adult. In relation to height, the average was very close to the lower limit established, while chest and cannon bone circumference were above the minimum recommended by ABCCC. Cannon bone circumference presented a positive correlation with height. Most of stallions presented excessive body fat, with a body score condition above 8 (scale 1-9). Neck fat accumulation presented a positive correlation with body score condition. Testicular height, length, width and volume presented a positive correlation between the ipsi and contralateral testicle, total testicular volume and DSO. In conclusion, no difference in the body and testicular biometric evaluation was observed between young and adult Crioulo stallions. Testicular and body growth are associated and also related to age, so our finding suggested that after 3-4 years-old most of Crioulo stallions have already reached maximum growth.

ABSTRACT The present study aimed to correlate the age and weight of Girolando heifers with uterine and ovarian development. Sixty heifers between 12 and 36 months old were weighed and subjected to ultrasound assessment to measure the diameters of each uterine horn and ovaries, monthly. These measures continued until their first ovulation. The animals were divided, for data analysis, according to their age into five groups: GI (12 to 14 months), GII (15 to 18 months), GIII (19 to 24 months), GIV (25 to 30 months), and GV (31 to 36 months). The dispersion diagram was used to assess the correlation between data collected monthly from uterus/ovaries and weight/age. An average daily growth of 0.0032 mm was recorded for the right ovary (RO) and 0.0051 mm for the left ovary (LO). The average size of the RO in GI was 17.58 mm and the LO was 15.28 mm; in GII, the RO was 16.72 mm and the LO was 15.89 mm; in GIII, the RO was 18.37 mm and the LO was 16.55 mm; in GIV, the RO was 19.09 mm and the LO was 17.49 mm; and in GV, the RO was 19.89 mm and the LO was 18.96 mm. The uterine horns showed an average daily growth of 0.0064 mm and 0.0071 mm for the right (RU) and left (LU) uterine horn, respectively. The average sizes of the uterine horns per group were: RU, 11.46 mm and LU, 11.48 mm; RU, 12.41 mm and LU, 12.63 mm; RU, 13.16 mm and LU, 13.19 mm; RU 14.30 mm and LU, 14.58 mm; and RU, 16.12 mm and LU, 16.68 mm for the groups GI, GII, GIII, GIV, and GV, respectively. The heifers showed an average daily weight gain of 0.224 kg and the groups GI, GII, GIII, GIV, and GV had an average weight of 220.5, 239.3, 287.6, 332.9, and 380.1 kg, respectively. Therefore, weight growth correlates with the growth of the ovaries and uterine horns; furthermore, these data correlate positively as the animals age.

ABSTRACT Objective: To determine the age of puberty onset in boys and collect anthropometric data of participants at different puberty stages. Methods: This is a cross-sectional study that assessed 430 boys in a random sample representing 48,390 students from public and private schools from the city of Uberaba, Southeast Brazil. The inclusion criteria were males, aged between 5 and 18 years, and absence of previous diseases. Participants and their guardians filled a semistructured questionnaire with questions relevant to their and their parents’ puberty. We set the significance at p

Introduction: Premature pubarche occurs in girls before the age of 8 or boys before the age of 9 and is a sign of precocious puberty associated with increased growth acceleration. Precocious puberty can be caused, among others, by nonclassic congenital adrenal hyperplasia (CAH). Case presentation: This is a case of a 4 1/2-year-old who developed premature pubarche six months before consultation, and whose parents were first-degree cousins. She had advanced bone age, her external genitalia were normal and her height was inconsistent with her mid-parental height. After performing an adrenocorticotropic hormone test (ACTH test) and other hormone tests, it was found that she had high levels of 17-hydroxyprogesterone (17-OHP), which allowed diagnosing her with nonclassic CAH. Based on this diagnosis, glucorticoid therapy was ordered, and after one year of starting the treatment she had a favorable clinical outcome and did not show any secondary sex characteristics or bone age progression. Conclusion: Nonclassic CAH is the most frequent cause of precocious puberty. Considering that this type of hyperplasia may be asymptomatic during the early days or years of life, its diagnosis must be suspected in children with precocious puberty, increased growth acceleration and advanced bone age.

Adolescence, a phase of transition to adulthood, is the period in which there is great personal, intellectual, social and also sexual development. Once adolescents are more open regarding sexuality, through the media, in addition to his critical maturity in development, there is a greater predisposition to believe in myths related to the theme. The aim of this study was to identify myths and beliefs related to sexuality, in the adolescents’ and young adults’ point of view. An integrative review of the literature was carried out and manuscripts published in the last ten years were included. A total of 2,260 participants, aged 11 to 25 years, were included in studies conducted in Brazil, Ghana and Turkey. Among the myths and beliefs studied are: female virginity is important for male sexual satisfaction; circumcision is necessary for intimate hygiene; dress and behavior encourage sexual harassment; alcoholic beverages and/ or illicit drugs increase sexual desire; a boy always has more pleasure than a girl; the bigger the boy’s penis, the greater the girl’s pleasure; girls don’t get pregnant in their first sexual intercourse; masturbation is bad for health, among others. Studies show the need for educational interventions in order to demystify young people’s erroneous beliefs about sexuality so that they can experience it safely and responsibly. [ABSTRACT FROM AUTHOR]

Identifying diferent anthropometric, physiological and motor aspects is essential to obtain success in sports practice. However, these components may be developed in same age subjects diferently, in part due biological development. he aim of the study was compare and correlate the explosive strength to biological maturation by sex, obtained by estimation of skeletal age based on anthropometric variables. he sample consisted of 239 subjects of both sexes, aged 10 to 13 years. Maturation was assessed by skeletal age predictive equation and upper and lower limbs explosive strength using medicine ball throw test and vertical jump, respectively. Skeletal age was assessed by skeletal age using a predictive anthropometrical based equation. Upper and lower limbs explosive strength were evaluated by medicine ball throwing test and vertical jump test, respectively. Post hoc analysis showed delayed biological development subjects had worst medicine ball throwing test performance than accelerated boys (p=0.001; d=0.96) and girls (p< 0.01; d= 2.01); regarding to vertical jump test, worst performance was also detected to maturational delayed boys when compared to accelerated ones (p=0.24; d=1.1) and girls (p=0.007; d=0.75). Regression analysis showed skeletal age explained variance of 36% and 19.2% for boys and 45.2% and 16.1% for girls upper and lower limbs explosive strength. Skeletal age is positively related to upper and lower limbs explosive strength and show higher performance for accelerated biological development young players when compared to delayed ones, independently from sex.

This study aimed to evaluate the effects of maternal exposure to triclosan (TCS), during gestation and lactation on physical development, puberty installation and testicular function of male offspring in puberty and sexual maturity. Sixteen pregnant Wistar rats were used and divided into four experimental groups: GI- they received corn oil daily by gavage; GII- they received 75 mg kg-1 day-1 of TCS; GIII- they received 150 mg kg-1 day-1 of TCS and GIV- they received 300 mg kg-1 day-1 of TCS during pregnancy and lactation. The mean weight of the treated rat’s offspring was lower in comparison to GI group. In the exposed offspring. A delay in puberty installation was observed following the exposure to triclosan. Regarding to the stages of the seminiferous epithelium in puberty, it was noticed an increase of the I-VI stages in GIV group, compared with to GI. In sexual maturity, it was observed an increase of VII-VIII, IX-XIII in contrast to a reduction of XIV stage in treated animals, comparing to GI. There was no difference in the number of Sertoli cells. We conclude that the maternal exposure to TCS during gestation and lactation causes restriction of the intrauterine development, delay in the puberty installation and deregulation in the seminiferous epithelium cycle.

ABSTRACT Objective: To evaluate cardiorespiratory fitness’ tracking from childhood to adolescence, as well as to test the moderation role of somatic maturation. Methods: Our sample was composed by 375 children (197 boys), with a baseline age between 7 and 10 years old. The children were followed-up over three years. Body mass and stature were measured as anthropometric indicators and were used to estimate maturity status through Moore’s method. Cardiorespiratory fitness was evaluated through 9-minute running test. Body adiposity was estimated through the subcutaneous skinfold method, with measures of triceps and subscapular skinfolds and used as a covariate. Sample was categorized into tertiles. Thereafter, the Kappa (k) coefficient and Lin’s concordance correlation coefficient (LCCC) tests were adopted to verify stability. Dummy variable in regression was used to test moderation effects. All analyses were conducted in Stata 14.0, adopting p

Glomuvenous malformations usually present as soft bluish-purple dermal or subcutaneous papules, nodules or plaques, and can occur as sporadic or inherited lesions. We present the case of a 41-year-old female, referred for evaluation of disseminated bluish lesions developing since puberty. Histopathology was consistent with the diagnosis of glomuvenous malformations. The history of a sister with similar lesions justified a genetic study of the glomulin gene that revealed a pathogenic mutational variant allowing the diagnosis of familial disseminated cutaneous glomuvenous malformations. Whereas surgical management is often used for symptomatic solitary lesions of glomuvenous malformations, other treatment modalities have been reported for treatment of multiple lesions, with variable results. The patient underwent sclerotherapy with polidocanol and there were significant symptomatic and cosmetic improvements after six sessions, with no adverse effects and no recurrence after 6 months. [ABSTRACT FROM AUTHOR]

The paper discusses the connection between perspectivism and gender from the Airo Pai ethnography of the shamanic language of celestial beings and the interspecific relations that cross it. I examine the connections between perspectivism, totemism and gender present in the shamanic chants of male puberty and in the indigenous exegesis of these chants. I argue that gender arises from multiple interspecific relations and it is expressed daily and ritually, especially in the shamanic teachings of male puberty that place young boys in the position of baby birds in their nests. Among the Airo Pai, being caught by the perspective of another does not always trigger predation. It is necessary to consider creation and temporality as vectors of the perception of celestial beings to understand gender as a perspective. [ABSTRACT FROM AUTHOR]

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Aerobic or resistive exercise has been tested on the performance of executive functions, human exercise, but exhaustive physical exercise still needs to be better investigated. It was our objective to determine the acute effects of a very short duration progressive exercise session on EF and motor skills of healthy young adults. Thirty-six subjects underwent EF tests, Digit Span for working memory, Stroop Test for Inhibitory Control and Digit Tracking for motor before and after performing an exercise session until maximal exhaustion. Statistical analysis was performed using the Shapiro-Wilks test to determine the normality of the data and Student's "t" test with a significance of 5%. The results were shown in mean and standard deviation. An exhaustive physical exercise session was able to improve working memory, inhibitory control and motor skills of young adults. Exhaustive exercise improved EF (working memory and inhibitory control) and motor skills of young adults. [ABSTRACT FROM AUTHOR]

Sports modalities require practitioners' high cognitive demands. This is one of the variables that influence athlete's performance especially for children because of different influence variables such as maturation. This study aimed to analyse relationship between bone age and inhibitory control in children aged from 8 to 14 years. Bone age was assessed by bone age predictive equation. Stroop test was performed to evaluate inhibitory control. Results show a moderate relation between bone age and reaction time (r=0.339; r2=0.159; p<0.001), but no relation was found to error. In addition, results show no significative difference to reaction time performance for normal and accelerated participants (t(124) = 1.261; p=0.210). There was no difference between Strop test errors what suggests that maturation has positive influence for inhibitory control related to velocity. [ABSTRACT FROM AUTHOR]

Reflexive Function is identified as an important construct for psychopathological understanding and for clinical practice. The aim of this study was to increase the knowledge about Reflexive Function in adolescents with different trajectories: a group of adolescents in conflict with the law (G1=91, M age=16.57 years, SD=0.77) and a group of teenager students (G2=64, M age=15,89 anos, SD=0,75). Instruments were a Sociodemographic Data Questionnaire, the Questionnaire on Reflexive Function for Young People and the Strenghts and Difficulties Questionnaire. Ninety-one non-clinical adolescents and 95 clinical teenagers took part in the study. Univariate analysis showed significant differences in the Reflexive Function considering the interaction between the G1 and G2 variables and the clinical and nonclinical categories. Thus, non-clinical G2 presented a greater reflex function (M=8.60, SD=0.68, F=4.66, p<0.05), followed by clinical G1 (M=8.29, SD=0.68). This characteristic in the clinical group of adolescents in conflict with the law points to hyper-inhalation. It is pointed out the need for evaluation and development of the Reflexive Function as prevention in mental health. [ABSTRACT FROM AUTHOR]

Copyright of Revista Veterinária em Foco is the property of Universidade Luterana do Brasil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To establish a profile of the aerobic fitness in young soccer players, it is critical to consider different intervenient factors such as maturity status, chronological age and playing position. The aim of this study was to identify the biological maturation, chronological age, and playing position effects on physical and physiological characteristics of young soccer players. Two hundred and one soccer players of 11-19 years old were divided into groups relative to their maturity status, chronological age and playing position. A maximal exercise test was performed to determine peak oxygen uptake (VO2peak) and ventilatory thresholds (VT1 and VT2) parameters in a treadmill. Biological maturation showed no significant effect on relative values (mL.kg-1.min-1) of VO2peak, VT2 and VT1 (0.004 < h2 < 0.039), but showed large positive effect on maximal aerobic speed (MAS) and speed at VT2 (VT2speed). Chronological age showed a medium positive effect on relative values of VO2peak, VT2 and VT1 (0.095 < h2 < 0.137) and a large positive effect on MAS and VT2speed. Relative values of VO2peak and VT1 showed no significant differences among groups for playing position (P>0.05; 0.044 < h2 < 0.051). However, goalkeepers showed significant lower relative values for VT2 and VT2speed than other playing positions and a medium positive effect was observed (P

Copyright of ConScientiae Saúde is the property of Nove de Julho University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of the present study was to verify the relationship between anthropometric risk factor with insulin resistance and beta cells function in puberty girls. The population sample was composed by 94 females teenagers. Were measured weight, height, body mass index (BMI), waist circumference (WC), waist to height ratio (WHR) sum of cutaneous skin folds triciptal e sub scapular (Σ of skin folds TR+SB), fat mass (%G), fasting glucose and insulin, calculating the HOMA-IR and HOMA-β index. Was verified the HOMA-IR relation with Obesity, WHR, Σ of skin folds (TR+SB) and %G in females. This study concluded that obesity, WHR, Σ of skin folds (TR+SB) and %G been associate with HOMAIR and HOMA- β index in females during the puberty period. [ABSTRACT FROM AUTHOR]

The experiment was conducted at the Federal University of Lavras. We used 64 lambs, which, after birth, were divided into four treatments: Diet A - 8.67; Diet B - 17.34, Diet C - 26.01 and Diet D - 34.68% neutral detergent fiber from forage (NDFf) in the diet. At three days of age, lambs were separated from their mothers and began receiving sheep milk replacer until weaning at 55 days. The experimental diets were isonitrogenous, formulated to meet the nutritional requirements of growing lambs, except for energy. Four digestibility diet essays were conducted for determining of metabolizable energy (ME) at different ages (43, 83, 123 and 173 days of life). The biometric variables analyzed were weight, testis weight, scrotal circumference and volume. The experimental design was in randomized blocks (DBC), in a 4 x 4 factorial arrangement (four levels of dietary NDFf and four slaughter ages), with 4 replicates per treatment. The estimation of scrotal circumference by weight proved to be more efficient than in function of age. The prediction of the size and weight of the testes through scrotal circumference was more efficient than by the age and body weight. Animals fed diets with less fiber from forage, that is, with greater amount of energy, showed better results of testis biometry compared to the animals fed smaller amounts of energy.

To determine the prevalence of body image dissatisfaction in adolescents and analyse associated factors. The sample under analysis comprised 278 adolescents, 10- to 17-year-old students from government schools in a small town in southern Brazil. Sociodemographic information was collected (age, sex, area of residence and educational level of family head), coupled to self-assessment of sexual maturation and body image perception (scale of body silhouettes). Frequency distribution was employed for statistical analysis; Student’s t test was applied for independent samples; chi-square and Fisher's exact test and Poisson regression with robust variance adjustment were used. The prevalence of body image dissatisfaction was 59.3%, or rather, higher among females (65.6%) than among males (53%). An association between body image and sexual maturation existed which revealed that post-pubescent adolescents were more likely to show body image dissatisfaction when compared to their pre-pubescent peers. Females and post-pubescent adolescents were more likely to feel body image dissatisfaction. Intervention programs may be proposed as strategies for the construction of a positive body image.

The aim of this study was to evaluate the response of dopamine in the growth hormone secretion (GH) during Nellore heifer’s sexual maturation. The animals were randomly assigned into two experimental groups: Sulpiride group (dopamine D2 antagonist, 0.59 mg/kg, S.C.) and control group (saline solution S.C.) at 8, 12 and 16 months of age. Blood samples were collected every 15 min for 10h after drug injection. Growth hormone was quantified by RIA, sensitivity (0.25 ng/mL) and intra and inter-assay variation coefficients were 15% and 17%, respectively. GH concentration was higher in sulpiride group than control group at 8 mo (10.1 ± 0.38 ng/mL vs 4.3 ± 0.34 ng/mL; P 0.05) in total GH secretion area, total peak area and maximum peak amplitude. These results suggested an inhibitory dopamine effect on GH secretion in pre-pubertal Nellore heifers that decreases according to age.

Introduction: Adolescence is a period marked by intense body modifications that occur differently according to the maturational stage and sex, which can generate different body image perceptions. Objective: This study aims to compare and associate body image satisfaction in different maturational stages. Methods: Overall, 207 adolescents of both sexes aged 10-12 years were evaluated. Maturation was estimated through an equation predictive of skeletal age and for the body image evaluation, the scale of silhouettes was used. The statistical tests used were chi-square and logistic regression (odds ratio) with respective confidence intervals (95% CI). Results: There was a prevalence of body image dissatisfaction of 63.8% (p <0.001). In both sexes, subjects with accelerated maturation had greater body image dissatisfaction (girls p= 0.01, boys p= 0.04), and desire to reduce their silhouette scale (p <0.001). Subjects with accelerated maturation were 2.88 more likely (CI 95% 1.03 - 8.05) of having body image dissatisfaction when compared to normal maturation; however, when adjusting for body mass index, the association lost its significance. Conclusion: It could be concluded that body dissatisfaction perceived by young individuals is independent of sex, and there is an association between accelerated maturational stage 2.88 times higher than in the normal maturational stage in relation to body dissatisfaction, in which the body mass index appears to be the main predictor for body dissatisfaction. [ABSTRACT FROM AUTHOR]

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Copyright of Revista Portuguesa de Ciências do Desporto is the property of Universidade do Porto, Faculdade de Desporto and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Normal puberty is a biological phenomenon comprising the morphological and physiological changes resulting from the activation of the neurohormonal mechanisms of the hypothalamic-pituitary-gonadal axis. However, the chronological anticipation of this phenomenon results in precocious puberty, which represents a group of diseases ranging from the normal variants of growth, favoring the adrenarche and early telarch, which is divided into precocious central or peripheral puberty. Given this, there is a great challenge regarding the adoption of the best form of treatment for this comorbidity. Therefore, the present article aims to discuss the best form of treatment for precocious central and peripheral puberty in girls. A bibliographic review was performed in the Scielo, Pubmed and VHL databases, as well as an active search with the keywords: "puberty", "precocious", "treatment", "GnRH", and "GH" and were selected A total of 20 published articles from the period 2000 to 2014. There is a consensus that GnRH analogues determine the decrease in rate of progression or even the involution of most of the pubertal characteristics of patients with precocious puberty. However, the experience of the various groups regarding the efficiency of treatment in the recovery of stature loss is different. Concerning the combined use of GnRH and recombinant GH analogues, there are currently no elements that confirm the benefit of the combination. The concomitant use of low-dose GnRH and estrogen analogs is a proposal that presents encouraging results in trying to minimize the marked slowing of the growth rate that occurs in some patients. [ABSTRACT FROM AUTHOR]

Introduction: Maturation is a biological phenomenon inherent to the human being that acts alongside environmental factors in its relationship with the development of children and adolescents. Objective: To analyse the motor skills during maturational stages of female adolescents. Methods: This study included 133 female adolescents aged between 10 and 17 years from federal schools in the city of Rio Branco, State of Acre, Brazil. Sexual maturation was evaluated using Tanner's self-assessment. Motor skills were assessed using the following tests: strength (Jump Test); coordination (Burpee Test); balance (Flamingo Test); flexibility (Sit and Reach Test); agility (Shuttle Run Test). The data were analysed using R software through analysis of variance. The significance level was fixed at 5%. Results: No significant statistical results were found for strength, agility, balance and flexibility, evidencing that maturational advances did not influence these skills. In the coordination variable, significant results were obtained. Conclusion: The results of this study suggest that maturational advancement in adolescents does not influence strength, agility, balance or flexibility. However, it does influence coordination, presenting better performance at stage P2. [ABSTRACT FROM AUTHOR]

Introduction: Hereditary haemoglobinopathies are the most common group of monogenic hereditary diseases in the world. Erythrocytes in sickle form, cellular expression of polymerization of deoxygenated HbS, cause intermittent vascular obstruction, leading to tissue ischaemia and consequent chronic damage in organs and endocrine glands. Objective: The evaluation of the growth pattern and pubertal development of a group of patients with sickle-cell anaemia from childhood to adulthood. Methods: Thirty patients withsickle-cell anaemia between the ages of 10 and 23 years were evaluated in a prospective longitudinal study at three points in time (Te1: 2005; Te2: 2010 and Te3: 2015) and compared with controls. Anthropometric, pubertal and hormonal evaluations were carried out. Age- and gender-specific Z-scores for weight, height and body mass index were calculated according to the reference growth standards. Results: Thirty patients with sickle-cell anaemia (mean age= 13.93 years) were evaluated at Te1 and 26 patients (mean age = 25.08 years) at Te3. The sickle-cell anaemia group lower showed Z-scores for weight (p = 0.0002), height (p= 0.0184) and body mass index (p = 0.0011) than the control group at Te1. At Te3, there was no difference in height, but weight (p = < 0.0001) and body mass index (p= < 0.0001) were lower in the sickle-cell anaemia group. Men showed greater weight commitment than women at the three study times (Te1: p= 0.0340, Te2: p= 0.0426 and Te3: p= 0.0387) and lower body mass index in Te3 (p= 0.0155) in the sickle-cell anaemia group. There was a significant increase in weight when comparing Te1 with Te3 (p= 0.0009) and in height when comparing Te1 with Te2 (p= 0.0292) and with Te3 (p= 0.0003) in the sickle-cell anaemia group. There was a significant increase in weight when comparing Te1 and Te3 (p= 0.0009) and in height when comparing Te1 and Te2 (p= 0.0292) and Te3 (p= 0.0003) in the sicklecell anaemia group. At Te1, 14 cases and 2 controls were prepubertal. Bone age was delayed in 12 patients. Age at menarche was delayed and lower in the sickle-cell anaemia group (mean = 15 years). Five patients had gestated, but no patient had experienced fatherhood. At Te1, TSH levels were higher (p= 0.0080) and T3 levels were lower (p= 0.0020) in the sickle-cell anaemia group. At Te3, LH and FSH levels were higher in men with sickle-cell anaemia (p= 0.0014; p; 0.0002). IGF-I levels were lower in cases both at Te1 (p= 0.0002) and at Te3 (p= 0.0032). Conclusion: Patients with sickle-cell anaemia showed growth impairment and pubertal delay compared with healthy controls. However, albeit belatedly, they reached normal sexual maturation and height in adulthood. Women with sickle-cell anaemia showed no fertility problems. The findings highlight the need to investigate the intention of paternity and fertility among men with sickle-cell anaemia. [ABSTRACT FROM AUTHOR]

Aerobic fitness is an important health-related fitness component. The objective of this study was to analyze the influence of age, growth, body composition, sexual maturation and socioeconomic status on the aerobic fitness of female school children attending public schools in Cascavel, Paraná, Brazil. Across-sectional epidemiological study was conducted in 2006 on 1,317 school children aged 8 to17 years. Body mass, height and triceps and medial calf skinfold thickness were measured and relative body fat (%BF) was calculated. Sexual maturation was self-assessed using a breast development scale (M1 to M5). The questionnaire proposed by the Brazilian Association of Research Companies was used to assess socioeconomic status. Aerobic fitness was estimated by the 20-m shuttle runtest. The results were analyzed using two-way ANOVA, Tukey post hoc test, Spearman and Pearson correlation coefficients, and multiple linear regression with 95% confidence intervals. Three variables (age, %BF and socioeconomic status) showed an interaction (p

The objective of this study was to verify the secular trends of sexual matu­ration of students between 11 and 15 years old, during a period of 10 and 20 years. The sample was composed by 1,002 students aged between 11 and 15 years; 536 boys (12.6±1.3 years old) and 466 girls (12.5±1.2 years old) who took part in the Ilhabela Mixed-Longitudinal Project on Growth, Development, and Physical Fitness. The students’ assessment period occurred in 1990/91 (initial), 2000/01 (10 years later), and 2009/10 (20 years later). Sexual maturation was analyzed according to the self-assessment method and age at menarche (month and year) was collected retrospectively. The statistical analysis used was: one-way ANOVA, and Tukey’s post-hoc test. The level of significance was p

In order to determine the profile of leptin and insulin values in seminal plasma and their correlations with sperm patterns during the peripuberty, a total of 16 crossbred Gyr dairy bulls were monitored from 60 days before to 60 days after puberty, separated into two groups, early and regular, according to the onset of puberty. Hormone values were determined by radioimmunoassay after gel filtration in fast performance liquid chromatography and semen patterns, according to the Brazilian College of Animal Reproduction. Insulin concentrations in seminal plasma did not differ between groups, nor between the ages, with the pooling of the data showing average of 35.15±16.93, 36.60±26.21, 26.82±09.81, and 43.56±31.71 32.24±16.71 U/mL for the pubertal period of -60, -30, 0, +30 and +60 days, respectively. These values were not correlated with sperm parameters, but differed in the group of animals with the highest percentage of major defects (31.08±18.58 U/mL) compared with those with lower percentage of these sperm defects (40.01±25.37 U/mL). Leptin was not correlated with sperm parameters and did not differ between groups or stage of sexual development, with concentrations of 23.10±10.43, 24.35±9.42, 22.41±9.90, 23.76±9.69 and 24.99±11.42 ng/mL for the periods of puberty aforementioned, respectively, after being grouped. These results demonstrated the binding of insulin to the structural quality of the sperm cell, and this hormone is indicated in andrologycal evaluation of future breeding soundness.

Objetivou-se determinar a idade à puberdade e maturidade sexual e sua relação com peso corporal e mensurações testiculares em tourinhos da raça Simental criados sob regime extensivo em clima tropical. Utilizaram-se 44 tourinhos com 1 a 30 meses de idade. As mensurações corporais e testiculares foram feitas mensalmente e os ejaculados coletados quinzenalmente, a partir dos seis meses de idade, utilizando-se o método de eletroejaculação. Observou-se idade à puberdade aos 13,42 ± 3,02 meses e maturidade sexual aos 21,43 ± 6,6 meses de idade, com peso corporal e perímetro escrotal, respectivamente, de 324,2 ± 23,7 kg e 26,90 ± 1,41 cm para a puberdade e 360 ± 69,04 kg e 34,88 ± 3,9 cm para maturidade sexual. Este estudo revelou idade tardia para a cronologia dos eventos reprodutivos, com relação direta do tipo de manejo adotado.The objective of this study was to determine the age at puberty and sexual maturity and its relationship with body weight and testicular measurements in Simmental young bulls raised under pasture conditions in a tropical climate. Forty-four young bulls at 1 to 30 months of age were used. Body and testicular measurements were made monthly and ejaculates collected fortnightly, from six months of age by using the method of electroejaculation. Age at puberty was 13.42 ± 3.02 months and sexual maturity was observed at 21.43 ± 6.6 months of age, with body weight and scrotal circumference of 324.2 ± 23.7 kg and 26.90 ± 1.41 cm for puberty and 360 ± 69.04 kg and 34.88 ± 3.9 cm to sexual maturity, respectively. This study found late age to the timing of reproductive events, with direct relation to the type of management adopted.

The aim of the present study was to characterize bone mineral density (BMD) and content (BMC) in Brazilian adolescent girls according to age and pubertal stage. A total of 329 girls ranging in age from 10 to 20 years participated in this study. Body weight, height, body mass index, pubertal stage, race, daily calcium intake, and time spent per week performing moderate to vigorous-intensity physical activity (MVPA) were evaluated. Lumbar spine and femoral neck BMD and BMC were assessed by dual-energy x-ray absorptiometry. One-way ANOVA with Tukey post-hoc test was used to identify differences in bone mass between ages and pubertal stages (p≤0.05). The daily calcium intake reported by the adolescents was inadequate, corresponding to only 26-47% of the recommended allowance (1,300 mg/day). On the other hand, weekly MVPA was higher than that recommended for adolescents. Significant differences in BMD and BMC were observed for girls aged 10-14 years. In addition, lumbar spine and femoral neck BMD was 58 and 31% higher in postpubertal girls, respectively, when compared to prepubertal adolescents.

OBJETIVO: o presente estudo teve como objetivo avaliar a idade óssea pelo método de Greulich & Pyle (1959) e o período do crescimento puberal, de acordo com o trabalho de Martins (1979). MÉTODOS: utilizaram-se radiografias de mão e punho de 201 crianças amazonenses, sendo 103 do sexo masculino e 98 do feminino, com idades cronológicas de 9 a 12 anos. Para análise estatística, utilizou-se o teste de qui-quadrado com nível de significância em 5% (pOBJECTIVE: This study evaluated the bone age using the Greulich & Pyle method (1959) and pubertal growth according to the study conducted by Martins (1979). METHODS: Hand and wrist radiographs of 201 children (103 boys) aged 9 to 12 years living in Amazonas were analyzed. A chi-square test was used for statistical analysis at a level of significance of 5% (p