Xiao Li and Song just entered the marriage hall, the newlyweds want to enjoy the world of two people after marriage, but do not want to be bound by the condom, so they choose to take the pill as a form of contraception. However, the pill is not a panacea, this month, Xiao Song menstruation late half a month did not come, the urine pregnancy test showed a “positive”! Faced with the unexpected arrival of this uninvited guest, the couple is torn: taking the pill after the failure of contraception pregnancy, the child will be affected by the drug? Can they still have it? The first thing you need to do is to make sure that you have a good idea of what you are getting into. Due to the lack of preparation for this unexpected child, many problems arise. Among them, the health of the child is the most important concern of the parents-to-be. During pregnancy, drugs can have adverse effects on the embryo directly through the placental barrier, and the hormonal components of birth control pills usually use synthetic hormones instead of natural hormones. These synthetic sex hormones may have certain effects on the fetus, such as feminization of male fetus or masculinization of female fetus, malformation of female fetus’ reproductive tract, and underdevelopment of male fetus’ testicles; in addition, birth control pills can also affect embryonic development indirectly by affecting maternal endocrine and In addition, birth control pills can also indirectly affect embryonic development by affecting maternal endocrine and metabolism, such as the occurrence of spontaneous abortion. In addition, the pill can also indirectly affect the development of the embryo by affecting maternal secretion and metabolism, such as spontaneous abortion. The effect of the pill on the embryo is closely related to the gestational age. During the pre-fertilization period, i.e. within 2 weeks after fertilization, the fertilized egg is not yet in direct contact with the maternal tissue and is still in the oviduct or uterine secretion, so the pill has little effect on the embryo during this period. Clinically, this period is also called the “all or nothing” period, which means that if the drug is used during this period, if the drug is very toxic, the fertilized egg will not be able to implant and cannot continue to develop into an embryo; if the drug does not affect the fertilized egg to implant, the drug will have little effect on the embryo. However, after the late embryo sac has been implanted, i.e. two weeks after fertilization, as the embryo has already established contact with the mother through the chorion and placenta, the drug may interfere with the normal differentiation of the embryo or fetal tissues and organs when used by pregnant women at this time. The question of whether or not you can have a child after a failed contraceptive pill depends on whether or not the pill was used during the “all or nothing” period. The risk of failure of birth control pills should be prepared. Why do I still get pregnant after taking the pill? The contraceptive pills commonly used today are short-acting pills, long-acting pills and emergency contraceptives, whose ingredients are mostly a combination of estrogen and progestin, or low-dose or strong progestin, whose contraceptive principle is that it can inhibit ovulation, or change the quality of cervical mucus and prevent sperm from penetrating, thus preventing fertilization or inhibiting endometrial proliferation and making its secretion poor, which is not conducive to the fertilization of eggs. However, it is important to note that the success rate of any contraceptive measure is not 100%. The main reason for the failure of oral contraceptives is the failure to take the pill as prescribed, such as omitting to take the short-acting pill or having unprotected sex after taking the emergency contraceptive pill. The pill is not a panacea, and even if it has a 99% success rate, you must be prepared for the possibility of a 1% failure. It is well known that abortion is harmful to women’s bodies, so it is important for couples to go to a regular hospital for advice on whether to terminate a pregnancy after a contraceptive failure and to refer to the reasonable advice of an experienced doctor on a case-by-case basis in order to minimize the risk. If you choose to continue the pregnancy, you should intensify monitoring during pregnancy. In general, screening can be used to detect congenital defects as early as possible and to prevent the birth of children with congenital defects. The details are: in early pregnancy, it is recommended to take blood test for stage I Down’s syndrome screening at 7-13 weeks of pregnancy and NT at the end of 11-13 weeks of pregnancy to assess the risk of chromosomal abnormalities; due to a history of adverse drug exposure, it is recommended to perform amniocentesis at 18-24 weeks of pregnancy, extract amniotic fluid for fetal cell culture and fetal karyotype analysis to understand whether there are chromosomal abnormalities; at around 20-24 weeks of pregnancy, it is necessary to perform Prenatal diagnostic ultrasound should be done around 20-24 weeks of gestation to observe the fetal structure and understand whether there are any developmental abnormalities.