Which is a TRUE statement about events occurring in the menstrual cycle?
A)Each peak in estrogen concentration is accompanied by an even greater peak in progesterone concentration.
B)FSH reaches its highest concentration 3 days before menstruation begins.
C)Progesterone is low during the first half of the cycle,and rises to a peak during the second half.
D)Ovulation occurs exactly in the middle of the follicular phase of the cycle.
E)The corpus luteum normally degenerates on day 14 of the cycle.

Question

Quizplus · Accepted Answer

Progesterone levels are low during the follicular phase and rise to a peak during the luteal phase. This is necessary for the thickening of the endometrium and preparation for potential implantation of a fertilized egg.

Note: A is incorrect because progesterone is not always accompanied by a peak in estrogen; B is incorrect because FSH actually decreases around the time of menstruation and begins to increase in the follicular phase; D is incorrect because ovulation can occur at different times during the follicular phase; and E is incorrect because the corpus luteum typically degenerates around day 22 of the cycle if fertilization does not occur.

Which Is a TRUE Statement About Events Occurring in the Menstrual