After taking mifepristone tablets to menstruation time has the following situations: 1, 3-7 days after stopping the drug to menstruation, because mifepristone is anti-progesterone, can be used as an emergency contraceptive to take, after taking the drug to stop the drug for 3-7 days, some people will have a larger amount of retractive bleeding, which can be regarded as coming to a menstruation; 2, do not have a menstruation, some people will not have a retractive bleeding after taking mifepristone, and some people Although there is retreating bleeding, but the amount is very small, not enough to be regarded as a menstruation, still according to their original menstrual cycle to menstruation; 3, the original menstrual cycle has been disrupted, menstruation delayed or early, may be due to the adverse effects of mifepristone, because it is an anti-progestational hormone medication, which may cause their own endocrine disorders, thereby affecting the menstruation to come on time.