A member asked:

What factors contributes to an onset of menstruation in young girls?

A doctor has provided 1 answer

Genetics and weight: Most girls have their first period at a age similar the their mothers. Overweight females tend to have an earlier onset of puberty. In most girls having precocious puberty, no cause is identified, but evaluation by a pediatric endocrinologist is needed. The genes and receptors controlling the onset of puberty are being studied. We don't have a final answer yet.

Answered 3/22/2020

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