Menstruation is periodic uterine bleeding:

Name: Menstruation is periodic uterine bleeding:
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Menstruation is periodic uterine bleeding that is controlled by a feedback system involving three cycles: the endometrial cycle,the hypothalamic-pituitary cycle,and the ovarian cycle.The average length of a menstrual cycle is 28 days,but variations are normal.During the endometrial cycle,the functional two thirds of the endometrium is shed.Lack of fertilization leads to menstruation.

Menstruation Is Periodic Uterine Bleeding