National Estimates of the Timing of Sexual Maturation and Racial Differences Among US Children

Abstract

Non-Hispanic black girls and boys mature early, but US children completed their sexual development at approximately the same ages. The present reference data for the timing of sexual maturation are recommended for the interpretation of assessments of sexual maturity in US children.

Male Adolescent Sexual and Reproductive Health Care

“…Two independent analyses of the same data indicate that the median age of SMR2 for genital development was 10.0 years for nonHispanic white boys, 9.2 to 9.5 years for non-Hispanic black boys, and 10.3 to 10.4 years for Mexican American boys, whereas the median age of SMR2 for pubic hair development was 12.0, 11.2, and 12.3 years, respectively. 16,17 These data suggest that a significant portion of boys are entering puberty earlier than 9.5 years, which was the previous lowest age of normal entry into puberty for boys. Future studies with comparable measures are needed to confirm these secular trends.…”

Adiposidade em adolescentes e obesidade materna

“…Os percentuais de concordância para desenvolvimento das mamas variaram de 57,3 a 65,2% e, para os pelos pubianos, entre 65,4 e 73,5%, valores inferiores aos apresentados na literatura, segundo os autores. Matsudo e Matsudo, citados por Sun et al 25 , apresentam concordância entre autoavaliações repetidas, variando entre 85 e 95%, em estudos com adolescentes brasileiros.…”

Sexuelle Reifung von Kindern und Jugendlichen in Deutschland

“…In Bezug auf einen früheren Reifebeginn sind sie für afroamerikanische Mädchen gegenüber weißen amerikanischen Mädchen beschrieben [37,38,39,40], ebenso für in den Niederlanden und in Deutschland lebende türkische Mädchen der 2. und 3. Generation gegenüber einheimischen Mädchen [6,20,41,42] …”