If there has been no menstruation, clinically, by examination, it is determined that there is no pregnancy, it is recommended to take progesterone orally to promote menstruation, take two capsules once a day for 3 days, most of them will have menstruation after 3-7 days of stopping the medication. If there is no menstruation on the 8th or 9th day after stopping the medication, it may be caused by premature ovarian failure, or other organic lesions. Clinically, amenorrhea can occur when there is a history of uterine manipulation prior to this, such as abortion, purging surgery, or diagnostic curettage, resulting in damage to the endometrium and causing uterine adhesions. Therefore, in combination with the clinical history, a comprehensive analysis is given. If there is no history of uterine operation, most of them will have menstruation after taking progesterone orally.