نتایج جستجو برای: puberty

تعداد نتایج: 9510  

Journal: :European journal of endocrinology 2012
Manuel Tena-Sempere

Puberty is a fascinating developmental phase that involves the attainment of reproductive capacity and the completion of sexual and somatic maturation. As a life-changing event, puberty onset is precisely controlled by interconnected regulatory pathways that are sensitive to numerous endogenous signals and environmental cues. The mechanisms of normal puberty and its potential deviations have be...

Journal: :Journal of abnormal psychology 2011
Kelly L Klump Jessica L Suisman Kristen M Culbert Deborah A Kashy Cheryl L Sisk

Puberty is a critical risk period for binge eating and eating disorders characterized by binge eating. Previous research focused almost entirely on psychosocial risk factors during puberty to the relative exclusion of biological influences. The current study addressed this gap by examining the emergence of binge eating during puberty in a rat model. We predicted that there would be minimal diff...

Precocious puberty can cause several adverse effects on final growth and social behavior in girls. Recently studies showed that low serum vitamin D levels might be associated with precocious puberty. The aim of  this research was to investigate the association between serum vitamin D levels and central precocious puberty in girls. Girls with central precocious puberty under the age of 8 we...

2012
Lu Xu Ming Li Jinhua Yin Hong Cheng Miao Yu Xiaoyuan Zhao Xinhua Xiao Jie Mi

A transient increase in insulin resistance (IR) is a component of puberty. We investigated the impact of body composition and adipokines on IR during puberty in Chinese children. This study included 3223 schoolchildren aged 6-18 years. IR was calculated using homeostasis model assessment (HOMA-IR). We revealed that body mass index (BMI) and waist circumference increased gradually during puberty...

Journal: :Journal of animal science 1976
D B Laster G M Smith K E Gregory

Postweaning growth and puberty traits were studied in 965 heifers produced by mating Hereford and Angus cows to Hereford, Angus, Jersey, South Devon, Limousin, Charolais and Simmental sires. Estrus was checked twice daily from 250 to either 480 or 510 days of age and age and weight at puberty were evaluated. Puberty was defined as date of first standing estrus. Charolais, Simmental and South De...

Journal: :Archives of pediatrics & adolescent medicine 1994
D M Wilson J D Killen C Hayward T N Robinson L D Hammer H C Kraemer A Varady C B Taylor

OBJECTIVE To test the hypothesis that the patterns of pubertal progression, early vs late puberty and fast vs slow, are associated with the age at which girls start to drink alcohol and smoke cigarettes. DESIGN The study included 1463 female students, 10.7 to 18.2 years of age, who were assessed five times during the 2.7-year study. Data regarding pubertal stage, alcohol use, and cigarette us...

Journal: :Journal of animal science 1975
G E Dickerson D B Laster

A study involving 825 spring ewe lambs was conducted to evaluate effects of breed, heterosis, type of birth and rearing, age of dam and preweaning and postweaning growth rate on occurrence of puberty before November 10. Within a breed or breed-cross, preweaning competition among twin and triplet lambs reduced lamb weights by 4 or 5 kg at 70 (weaning), 160 and 230 days of age and by about 3 kg a...

حشمت مویری, , علی ربانی, ,

Background: This study was performed in order to detect the frequency of different types of precocious puberty, predisposing factors and to show which group of patients need to treatment. Materials and Methods: In this study, 74 patients who referred to pediatric endocrine clinic of Imam Khomeini Hospital and private office from 1993-2000 were assessed. A complete history was taken and physical...

Journal: :Boyhood studies 2023

Abstract Puberty marks a time of significant transition in the life boy as he progresses toward adulthood—and confusion and concern. Many questions are likely thought or asked by approaches lives with puberty. Sex education is taught formally informally, home, on schoolyard, media. Over twentieth into twenty-first century, publishers have produced numerous books about puberty its experience for...

2015
Paula Sheppard Justin R. Garcia Rebecca Sear

BACKGROUND AND OBJECTIVES Childhood family background is known to be associated with child growth and development, including the onset of puberty, but less is known about the influence of childhood family disruption on outcomes in later life. Given the associations between early family disruption and childhood development, we predicted that there may be long-term health-relevant consequences of...

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