If medroxyprogesterone acetate tablets are used to delay menstruation, the medication needs to be started 5-7 days before the next menstrual period, and continuous use of the medication will ensure that the menstrual period does not occur. The medication can be stopped the day before a woman needs to have her period, and bleeding usually occurs about 3 days after stopping the medication, which means that menstruation resumes. Medroxyprogesterone acetate tablets are hormonal drugs that alter the physiological changes in the endometrium of a woman’s uterus by regulating the value of progesterone in her body, but it is important to start taking the drug 5-7 days before the onset of menstruation. If it is too close to menstruation and the endometrium has already entered the secretory phase, the purpose of delaying menstruation may not be achieved.