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A member asked:
What is average age for menarche?
8 doctors weighed in across 3 answers
12.5: The average age for onset of menstrual cycles is 12.5 the normal range is ages 9-15.
Answered 3/26/2013
5.9k views
12 and 1/2: For african americans about age 12 and a few months. For whites about 12 and a half. There have been at least five different studies since 2000 which gave slightly different results.
Answered 7/9/2015
5.9k views
Historically 12.5: But with the obesity epidemic it has moved up a couple years as has secondary sexual devleopment. The reason being - usually the body has to have a certain percentage body fat to begin menarche, thus athletic girls tend to have delayed menarche. A 2011 study found that each 1 kg/m2 increase body-mass index (bmi) can be expected to result in a 6.5% higher absolute risk of early menarche.
Answered 11/26/2013
5.9k views
Related Questions
A member asked:
What could be the cause of an early period (menarche at age 11) and heavy flow?
6 doctors weighed in across 2 answers
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