Signs: In girls, one or both nipples become prominant as the first visable sign, followed in 2.5 to 3 years by menses. In males, testicular enlargement is the first definite sign.With both, the gradual increase in genital and undeerarm hair, happen concurrently.However, some genital hair development can preceed puberty by 1-2 years as it is triggered by adrenal hormones rather than those from the brain.
Answered 7/28/2013
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