Abstract
A cross-sectional study of 1602 school boys of Sirohi town aged 8 to 18 yr for development of secondary sex characters using Tanner’s sexual maturity ratings carried out. Mean (±SE) age of onset of puberty is 9.95 (±0.06) yr and that of completion is 16.26 (±0.08) yr. Though boys of Rajasthan begin earlier to have pubertal changes, but total time taken to attain full maturation is longer than British. The Growth of genitalia starts first and completes in last, whereas that of pubic hair starts later but completes earlier. Facial hair and axillary hair follow pubic hair in development. Development of breast and apocrine function take place between stage 3 and 4 of genital growth.
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