A member asked:

My daughter just got her 1st period. how many mos. will she wait till she gets it again? i've read that it'll be irreg. on the first few months. help.

A doctor has provided 1 answer

Varies: Young women often don't ovulate consistently in the first 6m to 1 yr. Ovulation adds a natural regulator hormone to the process. Otherwise the cycles are driven by estrogen and irregular cycles occur.15-45 days are common but up to 90 days has occurred in normal girls. When delayed, they are often heavier. In time they settle down into a more traditional pattern.

Answered 11/28/2017

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