Women generally eat progesterone is divided into two cases: one is irregular menstruation can be oral progesterone to promote menstruation, the occurrence of withdrawal bleeding, the other is in the pregnancy if the progesterone is low, you can oral progesterone used to protect the fetus treatment. But under what specific circumstances need to take progesterone, it is necessary to take under the guidance of a doctor, to avoid the adverse effects of self-medication on the body. Progesterone is a kind of progesterone, can adjust women’s menstrual cycle, can also be used for women’s preterm miscarriage birth control treatment. During the period of taking progesterone, if the woman is for birth control, she should have a regular ultrasound review, and even have a progesterone test to understand the situation of birth control. If progesterone is used to adjust the menstrual cycle, the onset of menstruation usually occurs 3-7 days after stopping progesterone.