Still largely unknow: We still do not know precisely, yet certain hormonal chemicals are well know to play a major role such as leptin, gpr54, kisspeptin and melatonin.
Answered 5/7/2014
6.3k views
Genetics leptin: Genetics is one factor. Achieving a certain body weight, especially body fat. Adipose makes leptin, which is a signal to the brain to start making reproductive hormones. Girls with low body weight (eg gymnasts, balarinas) often have a delayed puberty.
Answered 3/12/2014
5.2k views
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