Withdrawal of which of the following hormone is the immediate cause of menstruation?
Withdrawal of which of the following hormone is the immediate cause of menstruation?
progesterone
estrogen
$\mathrm{FSH}$
FSH-RH
Solution
There is no menstrual cycle during pregnancy due to the secretion of progesterone hormone by the corpus luteum. The progesterone hormone inhibits the production of the gonadotropic hormones from the pituitary and prevents the uterine lining from sloughing and supports pregnancy.