Which of the following is true during the 12-hour period preceding ovulation?
Ovulation will not take place unless a surge of LH precedes it. Immediately prior to ovulation, the number of follicles is decreasing due to normal attrition of all but one follicle, and consequently estrogen synthesis by the ovary is decreasing. Progesterone synthesis is stimulated by the LH surge.
A surge of LH is secreted from the pituitary
The surge occurs immediately after the formation of the corpus luteum
The surge is followed immediately by a fall in the plasma concentration of progesterone
The number of developing follicles is increasing
Female Reproductive System