Menstruation is periodic uterine bleeding:
A) that occurs every 28 days.
B) in which the entire uterine lining is shed.
C) that is regulated by ovarian hormones.
D) that leads to fertilization.

Question

Quizplus · Accepted Answer

Menstruation is periodic uterine bleeding that is controlled by a feedback system involving three cycles: endometrial,hypothalamic-pituitary,and ovarian.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 are shed.Lack of fertilization leads to menstruation.

Menstruation Is Periodic Uterine Bleeding