Delayed menstruation after taking emergency contraceptive pills needs to be treated according to its causes, such as adverse drug reactions, early pregnancy, etc., and general treatment and medication should be taken after clear diagnosis. 1. Adverse drug reactions: delayed menstruation after taking emergency contraceptive pills is a normal phenomenon, usually delayed menstruation not more than 7 days, without special treatment. If the menstrual period is delayed for a longer period of time and there is no pregnancy, if necessary, you can follow the doctor’s instructions to use progesterone capsules to promote menstruation. 2. Early pregnancy: delayed menstruation after taking emergency contraceptive pills may also be an early pregnancy, emergency contraceptive pills are not 100% contraceptive, so there is also the possibility of early pregnancy. If the period is delayed for a long time, it is recommended to go to the hospital for a pregnancy test and ultrasound examination to clarify whether the pregnancy. The reasons for delayed menstruation after taking emergency contraceptive pills are different, and so are the treatment modalities. It is recommended to go to the hospital in time to get a clear diagnosis and then give standardized treatment. The above drugs must be used under the guidance of a doctor, and must not be used indiscriminately, so as not to lead to adverse consequences.