Vaginal bleeding: The menstrual cycle is monthly vaginal bleeding which occurs when the woman is fertile and ovulates (produces an egg, which takes about 2 weeks) but does NOT then get pregnant. The uterine lining will build up for a couple of weeks to prepare for a possible pregnancy. This will shed away in the form of bleeding when pregnancy has not occurred and then the process will start all over again.
Answered 6/24/2018
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