Progesterone is an important hormone in women’s body, together with estrogen, can play a role in promoting endometrial proliferation and exfoliation, the formation of menstruation, also can promote the development of breast tissue, can promote the excretion of water and sodium in the body, prevent and relieve lower limb edema, can change the cervical mucus properties, prevent sperm from passing through the female cervical opening. For women after pregnancy, it goes to maintaining the secretory phase state of the endometrium, which facilitates the development of embryonic tissues. It is mainly used clinically in conjunction with estrogen to regulate the menstrual cycle, to induce menstruation in case of delayed menstruation, to treat pharmacological curettage in case of functional uterine bleeding, and to treat fetal retention in case of symptoms of preterm abortion.