Individual irregularities in the ovarian (menstrual)cycle are most often caused by:
A) variations in the follicular (preovulatory) phase.
B) an intact hypothalamic-pituitary feedback mechanism.
C) a functioning corpus luteum.
D) a prolonged ischemic phase.

Question

Quizplus · Accepted Answer

Almost all variations in the length of the ovarian cycle are the result of variations in the length of the follicular phase.An intact hypothalamic-pituitary feedback mechanism is regular,not irregular.The luteal phase begins after ovulation.The corpus luteum depends on the ovulatory phase and fertilization.During the ischemic phase,the blood supply to the functional endometrium is blocked and necrosis develops.The functional layer separates from the basal layer,and menstrual bleeding begins.

Individual Irregularities in the Ovarian (Menstrual)cycle Are Most Often Caused