In the absence of the implantation of a fertilized embryo, the menstrual phase of the uterine cycle is initiated by the degeneration of the
A)corpus albicans.
B)endometrium.
C)Graafian follicle.
D)myometrium.
E)corpus luteum.

Question

Quizplus · Accepted Answer

The menstrual phase is initiated by the degeneration of the corpus luteum, which leads to a decrease in progesterone and estrogen levels, causing the endometrium to shed.

In the Absence of the Implantation of a Fertilized Embryo