How does the HPG acid control the uterine cycle? a. Rising estrogen from the vesicular follicle matures and maintains the stratum functionalis in the secretory phase
b. Progesterone from the corpus luteum causes the formation of a new stratum functionalis
c. When the corpus luteum degenerates to the corpus albicans, progesterone is lost and the stratum functionalis dies
d. If pregnancy occurs, the corpus luteum will continue secreting estrogen to maintain the stratum functionalis