Pregnancy after taking emergency contraceptive pills is recommended to be retained, but it needs to be treated with active maternity tests at all periods, depending on the common results. Emergency contraceptive pills are commonly used as levonorgestrel tablets, and the child can be wanted after taking them resulting in contraceptive failure. This is because the effects of adverse factors on the embryo during the first 30 days of pregnancy are all and none effects. The full effect will cause miscarriage or fetal arrest, after the occurrence of termination of pregnancy can be. No effect is no effect on the embryo, because at this time the embryo has not yet differentiated, usually does not lead to fetal malformation. Therefore, after oral emergency contraceptive pills can be retained if there is a requirement for reproduction. Under the guidance of a specialist, it is sufficient to actively undergo obstetrical examinations at various times, and then consider termination of pregnancy if fetal malformation is diagnosed during the examination.