Reference Terms
from Wikipedia, the free encyclopedia

Menstrual cycle

The menstrual cycle is the set of recurring physiological changes in a female's body that are under the control of the reproductive hormone system and necessary for reproduction.

In women, menstrual cycles occur typically on a monthly basis between puberty and menopause.

Note:   The above text is excerpted from the Wikipedia article "Menstrual cycle", which has been released under the GNU Free Documentation License.
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August 28, 2015

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updated 12:56 pm ET