Different time with different consequences of the drug: 1 week after fertilization of the egg with drugs, fertilized egg has not been planted in the endometrium, generally unaffected by drugs; such as fertilization 1-2 weeks with drugs, fertilized egg has been planted in the uterine membrane, but the tissue has not yet been differentiated, the drug produces an effect in addition to miscarriage, and does not give rise to teratogeny, is a safe period. Therefore, in pre-pregnancy or early pregnancy took some drugs on the fetus will not have too great an impact, do not have to worry too much, and do not have to make abortion. After fertilization 3-8 weeks (5-10 weeks after menopause) is the formation of embryonic organ differentiation period, very susceptible to external factors such as drugs and other factors that lead to fetal malformations, is a “highly sensitive period of teratogenicity”. During this period, it is not necessary to use drugs, including general health products and tonic drugs. Those that can be used or not used, or those that can be temporarily discontinued, should not be used. If you must use medication, you must use it carefully and safely under the guidance of your doctor. If the pregnancy continues, prenatal diagnosis (including ultrasound systematic screening) can be carried out during the 16-24 weeks of pregnancy to further understand the growth and development of the fetus and to rule out fetal malformations.