Estrogen and progesterone are responsible for the cyclical changes in the endometrium (uterine lining), including
menstruation. In addition, a woman’s genital tract should be free of any abnormalities
to allow the passage of menstrual blood
Why is Provera prescribed?
Provera is derived from the female hormone progesterone. You may be given Provera if your menstrual periods have stopped or a female hormone imbalance is causing your uterus to bleed abnormally.