Luteinizing hormone is a natural endogenous progesterone secreted by the corpus luteum of the female ovary, which plays an important role in women’s menstruation and pregnancy. Progesterone capsules are mainly used for clinical applications in obstetrics and gynecology, such as menstrual disorders, luteal insufficiency, miscarriage, premenstrual tension syndrome, menopausal syndrome and prevention of endometrial hyperplasia. 1.Progesterone has an important role in the process of fertilization, pregnancy, lactation and ovulation. It can make the opening of the cervix close and the mucus reduce and thicken, so that sperm cannot penetrate easily. Later in the menstrual cycle, it causes the growth of glands in the mucous membrane of the uterus, engorgement of the uterus and thickening of the endometrium in preparation for implantation of the fertilized egg. After implantation of the fertilized egg, it causes the production of the placenta and reduces the excitability of the pregnant uterus, inhibiting its activity and allowing the fetus to grow safely. In combination with estrogen, it promotes full breast development and prepares for breast production. When applied in large doses, it inhibits the secretion of pituitary gonadotropins through the negative feedback effect on the hypothalamus, producing an inhibitory effect on ovulation. 2. Progesterone, as exogenous progesterone, can inhibit contractions and reduce the excitability of the uterine muscle, and also reduce the sensitivity of the uterine muscle to various stimuli, especially contractin. It also prevents metaplastic regression, which is necessary to maintain the metaplastic response. It also suppresses the immune response, and increased progesterone in normal pregnancy prevents embryo rejection by the mother and maintains the pregnancy. In summary, progesterone is a natural progesterone secreted by the corpus luteum of the ovary and has the general effects of progesterone. For specific medication, please combine with clinical and doctor’s interview guidance.