Progesterone, also known as progesterone, is a kind of progesterone secreted by the corpus luteum of the ovary, which has the effect of regulating menstruation and protecting the fetus. For irregular menstruation injections of progesterone hormone need to be shot for about 3-5 consecutive days, 3-5 days after the general can return to normal, if the injection during the period of menstruation should be stopped. Irregular menstruation is a common disease in women, subject to cyclic changes in the levels of estrogen and progesterone in the body, resulting in cyclic shedding of the uterine lining. When the uterus reaches a certain thickness, the body progesterone is not enough to cause the endometrium to fall off, there can be no menstruation, abnormal vaginal bleeding and other symptoms of irregular menstruation, at this time by artificial simulation of progesterone levels decline, supplementation of progesterone and then stopping the drug, the formation of withdrawal of bleeding, you can achieve the function of menstruation. This progesterone only simulates progesterone in the body and will not cause adverse effects on the body. In addition, the application of progesterone treatment has two ways of injection, oral medication, the specific time requirements are different. In case of luteal insufficiency, it can be combined with estrogen, oral progesterone capsules or dextroprogesterone tablets. During the injection of progesterone, pay attention to rest and do not exercise strenuously.