For the initial days following ovulation in a nonpregnant menstrual cycle, the main source of progesterone is the ________.
A) adrenal cortex
B) anterior pituitary
C) corpus luteum
D) developing follicle
E) placenta

Question

Quizplus · Accepted Answer

After ovulation occurs, the ruptured follicle transforms into the corpus luteum, which secretes high levels of progesterone to prepare the uterus for potential implantation of a fertilized egg. If pregnancy does not occur, the corpus luteum will degenerate, causing progesterone levels to drop and leading to the shedding of the uterine lining during menstruation. The other options listed (adrenal cortex, anterior pituitary, developing follicle, and placenta) are not the main source of progesterone during the initial days following ovulation in a nonpregnant menstrual cycle.

For the Initial Days Following Ovulation in a Nonpregnant Menstrual