Progesterone to promote menstruation will not cause harm to the body, the current clinical use of progesterone pills, is a natural progesterone, side effects are very small, will not cause harm to the body. Because the ovary cycle in the secretion of estrogen and progesterone, when the ovary because of some reason the secretion of estrogen or progesterone, is not enough to maintain normal menstruation, we must resort to external support of progesterone to promote menstruation. Therefore, progesterone has no effect on the body, and after urging menstruation, menstruation will usually occur within 3-7 days after stopping the medicine. If the next period is still not normal, it is recommended to go to the hospital to check the sex hormone six and thyroid function, to find out the cause, and then targeted treatment.