OBJECTIVES The object of this study was to determine the relationship between body mass index (BMI) and early menarche in adolescent girls in Seoul. METHODS A retrospective study was conducted with 144 middle school students in Seoul who provided informed consent. We measured their body composition, and used the questionnaire survey method for data collection from November to December 2008. P...

The present study reports menarcheal age of girls from Kraków area (Poland) and its association with socio-demographic variable and body size in young adulthood. The data was obtained from 1,785 girls, aged between 16 and 18 years. The mean age at menarche determined by retrospective recall was 13.04±1.12. ANOVA and multiple – comparison test – LSD were applied to test significance of social cl...

This paper revisits and extends an inquiry on the age-at-menarche differential fecundity hypothesis. Earlier studies have interpreted the difference in the onset of female pubertal maturation as indicative of biological differences in fecundity between early and late menarcheal women. Using the WFS data for Sudan, the authors address the entire reproductive life of the women in terms of their t...

OBJECTIVES Youth exercise is associated with improved body composition, but details regarding timing and persistence are limited. We examined pre- and circum-menarcheal organized physical activity exposure (PA) as a factor in development of early post-menarcheal lean mass, fat mass and muscle strength. METHODS Participants in a longitudinal study of musculoskeletal growth using dual energy X-...

The aim of this study was to represent the trend of early menarche and to assess the association of age at menarche with anthropometric profiles of Korean children and adolescents. A cross sectional survey was conducted with 13,371 girls aged 10 to 18 yr, recruited nationwide from April, 2005 to March, 2006. Height, weight and waist circumference of the subjects were measured; and the subjects ...

Age at menarche is correlated within families, but estimates of the heritability of menarcheal age have a wide range (0.45-0.95). We examined the familial resemblance for age at menarche and the extent to which this is due to genetic and shared environmental factors. Between 2003 and 2010 data were retrospectively collected by questionnaire from participants within the UK-based Breakthrough Gen...

OBJECTIVE A site-specific bone loading index was developed to predict post-menarcheal arm bone mass, geometry, areal density and non-bone lean mass using organized activity records. METHODS Two cohorts of post-menarcheal girls (A= 55, B= 48) met analysis inclusion criteria: (1) Whole body and non-dominant radius DXA scans +1.0 to +2.6 years post-menarche; (2) detailed, organized activity reco...

BACKGROUND AND OBJECTIVES Patterns of development predict cardiovascular disease (CVD) risk, and ethnic differences therein, but it remains unclear why apparently 'adaptive plasticity' in early life should generate health costs in later life. We hypothesized that offspring receiving low maternal investment during fetal life, the primary period of organogenesis, should predict a shorter reproduc...

Subjects filled out questionnaires and were individually observed interacting with an 8-to-12-month-old infant in a waiting room. Hidden observers recorded the frequency of ignoring, responsiveness to infant bids, and of social bids to the infant. Analyses revealed that oMer girls ignored more, made fewer bids, and responded less than younger girls did. IIowever, chronological age was highly co...