The menstrual flow is the result of
A) no implantation of a zygote.
B) decreased levels of progesterone.
C) discarded uterine linings.
D) no implantation of a zygote and discarded uterine linings, only.
E) no implantation of a zygote, discarded uterine linings, and decreased levels of progesterone.

Question

Quizplus · Accepted Answer

Menstrual flow occurs due to the absence of zygote implantation, leading to decreased progesterone levels, which causes the uterine lining to shed.

The Menstrual Flow Is the Result of