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What is a menstrual cycle?

A menstrual cycle is the regular cycle of changes that prepares a woman's reproductive system for pregnancy. It involves a complex system of glands, hormones, and the uterus and ovaries. An average menstrual cycle is 28 days, although it can vary from 21 to 35 days.

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Author: Kellie Heywood
First answered: 23 Nov 2014
Last reviewed: 19 May 2018
Rating: 4.3 out of 5
Votes: 1502 (Click smiley face below to rate)
Category: Premenstual syndrome (PMS)


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