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Children's Health

Menstrual cycle



My daughter is 12 and she has not started her period yet.


That is not unusual, as 12 is about the average age that a young girl will start her periods.  What that means in a practical sense is that half of the girls will be older when they start their periods.

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Response by:

Michael Spigarelli, MD, PhD
Formerly, Associate Professor of Pediatrics and Internal Medicine
College of Medicine
University of Cincinnati