Menstruation is Directly Caused by a Decrease in the Ovarian

Question

Menstruation is directly caused by a decrease in the ovarian secretion of
A)progesterone and estrogens
B)testosterone and progesterone
C)progesterone only
D)estrogens only
E)LH

Accepted Answer

Menstruation is directly caused by a decrease in the levels of the hormones progesterone and estrogens. These hormones are produced by the ovaries, and their levels drop in the absence of fertilization, leading to the shedding of the uterine lining and the onset of menstruation. Testosterone and LH do not play a direct role in menstruation, and progesterone-only or estrogen-only changes would not be sufficient to cause menstruation.