During the secretory phase of the menstrual cycle ________.
A) LH reaches its highest levels
B) the Graafian follicle forms
C) estrogen reaches its highest levels
D) progesterone levels are at their highest

Question

Quizplus · Accepted Answer

During the secretory phase of the menstrual cycle, progesterone levels are at their highest. This is because the corpus luteum, which forms from the remains of the ruptured Graafian follicle after ovulation, produces progesterone as well as some estrogen. Progesterone prepares the endometrium for implantation of a fertilized egg and maintains it after implantation. LH and estrogen levels peak during the earlier follicular phase, leading up to ovulation.

During the Secretory Phase of the Menstrual Cycle ________