In the female reproductive cycle, menstrual flow occurs when the concentrations of __________.
A) estrogen and progesterone are low
B) estrogen and progesterone are high
C) estrogen is high and progesterone is low
D) progesterone is high and estrogen is low
E) estrogen and progesterone are absent

Question

Quizplus · Accepted Answer

Menstrual flow occurs when the concentrations of estrogen and progesterone are low, leading to the shedding of the uterine lining.

In the Female Reproductive Cycle, Menstrual Flow Occurs When the Concentrations