How long does it take for menstruation to come after taking emergency contraceptive pills?

The topic of emergency contraceptive pills affecting menstruation is of concern to many women. How long does it take for menstruation to come after taking emergency contraceptive pills ? How long is a delay considered normal?

Emergency contraceptive pills are emergency remedies taken after unprotected sex or contraceptive failure. Emergency contraceptive pills are usually taken within 72 hours after sex, and no later than 120 hours. The earlier you take it, the greater the chance of successful contraception. Some women still have questions, will taking emergency contraceptive pills affect menstruation, will it delay menstruation?

The instructions for contraceptive pills usually state that it is normal for the first menstrual period to be delayed or advanced by one week after taking the pill. That is, emergency contraceptive pills may cause the menstrual cycle to be delayed or advanced. The effect of emergency contraceptive pills on menstruation is related to the time of taking the pills.

There is usually a one-month interval between two menstrual periods. If emergency contraceptive pills are taken in the first half of the menstrual cycle, the impact on menstruation will be greater, and vaginal bleeding symptoms are more likely to occur. If emergency contraceptive pills are taken in the second half of the menstrual cycle, the impact on menstruation will be relatively reduced. If menstruation occurs after taking emergency contraceptive pills for a period of time, and the amount of bleeding is equivalent to the normal menstrual flow, it can be regarded as a menstrual period.

Keep in mind that birth control pills can inhibit delayed ovulation and suppress the endometrium, which may prolong or advance the menstrual cycle. If the delay is more than half a month, it is best to use early pregnancy papers or take tests to rule out contraceptive failure.