If the fetus has no developmental abnormalities, it can be retained in principle, and you only need to go to the hospital regularly for maternity checkups. There are many causes of abnormal fetal development or malformation, in addition to drug factors, such as genetic abnormalities, chromosomal abnormalities, exposure of pregnant women to certain physical and chemical factors during pregnancy, radiation and so on can lead to abnormal development of the fetus. Emergency contraceptive pills contain a large number of hormones, can also cause the shedding of the uterine lining, can occur a priori miscarriage, but not by virtue of oral contraceptives can not have a baby, if in the later part of the process of obstetrics, the fetus does not have congenital developmental anomalies or deformities, etc., is to continue to retain the pregnancy until delivery. Pregnant women during pregnancy application of drugs must follow the doctor’s advice, can not be indiscriminate use of drugs, and at the same time after pregnancy must be regular obstetric examination.