NEET BIOLOGY

Detailed explanation-1: -Menstruation is caused by the reduction of estrogen and progesterone (especially progesterone) at the end of monthly ovarian cycle.

Detailed explanation-2: -Progesterone is also used to bring on menstruation (period) in women of childbearing age who have had normal periods and then stopped menstruating. Progesterone is in a class of medications called progestins (female hormones).

Detailed explanation-3: -Progestins work by causing changes in the uterus. After the amount of progestins in the blood drops, the lining of the uterus begins to come off and vaginal bleeding occurs (menstrual period). Progestins help other hormones start and stop the menstrual cycle. .

Detailed explanation-4: -Progesterone and menstruation Progesterone works by thickening your uterine lining and creating a good environment for a fertilized egg to implant. If an egg isn’t fertilized during that cycle (meaning you don’t get pregnant), the corpus luteum breaks down, which decreases progesterone levels.