Timing of sexual development among school-aged boys in Shanghai

SHI Hui-jing; LI Dan; WANG Wen; ZHANG Yue; TAN Hui; WANG Zhen-wei

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Chinese Journal of Child Health Care ›› 2012, Vol. 20 ›› Issue (11) : 975-978.

Timing of sexual development among school-aged boys in Shanghai

SHI Hui-jing,LI Dan,WANG Wen,ZHANG Yue,TAN Hui,WANG Zhen-wei

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Abstract

【Objective】 To determine the current timing of boys' sexual maturity in Shanghai. 【Methods】 A school-based cross-sectional survey was conducted among 1 787 boys aged 6~20 years old in Shanghai.Puberty was staged according to the Tanner.Mean age at entry into each pubertal stage was calculated by probit analysis. 【Results】 Median age at attainment of testicular volume above 4 mL and 12 mL was 10.71 years and 12.24 years,respectively.Median age at entry into genital stage of Ⅱ~Ⅴwas 11.68,12.81,14.31 years and 16.55 years,respectively.Median age at entry into pubic hair stage Ⅱ~Ⅴ was 12.57,13.19,14.25 years and16.92 years,respectively.Median age of onset of armpit hair and bread development was 14.07 years and 15.11 years,respectively.And median spermarche age was 16.63 years. 【Conclusions】 In comparison to those living in cities of middle or western China and some other countries,boys in Shanghai start pubertal development a little bit later,and the progress of sexual development is also relatively slower.Median age of spermarche is being postponed.

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male / child / puberty / sexual development

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SHI Hui-jing,LI Dan,WANG Wen,ZHANG Yue,TAN Hui,WANG Zhen-wei. Timing of sexual development among school-aged boys in Shanghai[J]. Chinese Journal of Child Health Care. 2012, 20(11): 975-978

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