Progesterone is progesterone, a hormone secreted by the corpus luteum of the ovary, which together with estrogen maintains the endometrium to form a regular proliferative phase, secretory phase and shedding after forming menstruation. In adolescent girls or fertile women, if the progesterone secretion is low due to poor ovarian function, it may lead to follicular dysplasia and non-ovulation, causing menstrual disorders or functional uterine bleeding. It is necessary to consult a gynecologist and use etidol and progesterone to do artificial cycle therapy to promote normal ovarian function. The progesterone secreted by the ovaries of pregnant women in early pregnancy will also gradually increase in large amounts, which will promote placental development and facilitate healthy fetal development. If the progesterone secretion is insufficient or decreases, it will affect the development of the fetus and lead to preterm miscarriage, so it is necessary to cooperate with the doctor to use progesterone for fetal preservation treatment.