While there are many couples of childbearing age who are actively preparing for pregnancy, there are also many unwanted pregnancies. For the unexpected arrival of the child, due to the lack of preparation many questions arise. Among them, the health of the child is the most important concern of the parents – contraceptive failure of the child, in the end, still want? During pregnancy, the drug can directly through the placental barrier on the embryo to produce adverse effects, contraceptive pills in the hormone components usually use synthetic hormones, rather than natural hormones, these synthetic sex hormones may have a certain effect on the fetus, such as male fetal feminization or female fetal masculinization, female fetal genital tract deformities, testicular insufficiency in male fetuses, and other issues; in addition, contraceptives can also be through the impact of maternal endocrine, In addition, contraceptive pills can also indirectly affect the development of embryos by affecting maternal endocrine, metabolism and other indirect effects, such as the occurrence of spontaneous abortion. Is it impossible to have a child conceived after taking birth control pills? The effect of drugs on the embryo is closely related to the age of the fetus, in the pre-implantation period, that is, 2 weeks after fertilization of the fertilized egg, because at this time the fertilized egg and the maternal tissues have not yet been in direct contact with the fallopian tube or the uterine cavity in the secretion, so this period of medication on the embryo is not much effect. Clinically, this period is also referred to as the “all or nothing” period, that is, the use of drugs in this period, such as drug toxicity is very large, the fertilized egg will not be able to bed, it is impossible to continue to develop into an embryo; if the drug does not affect the fertilized egg to bed, then the drug does not have a significant impact on the embryo. However, after the late embryonic sacs are implanted, that is, two weeks after fertilization, as the embryo has been established with the mother through the chorionic villi and placenta, at this time pregnant women with drugs, the drug may interfere with the normal differentiation of the embryo or fetal tissues and organs. Doctors have reminded that the question of whether or not a child can be born after a contraceptive failure depends on whether or not the medication is used during the “all or nothing” period. As we all know, abortion does not harm women’s bodies, therefore, for the question of whether pregnancy after contraceptive failure must be terminated, couples must go to a regular hospital for consultation, refer to the experienced doctors according to the specific circumstances of the reasonable advice, in order to minimize the risk. Tips: If you choose to continue the pregnancy, you should strengthen your pregnancy monitoring. Generally speaking, early detection of congenital defects through screening can prevent the birth of children with congenital defects.