Whether the medication taken at 7 weeks of pregnancy has any effect on the fetus is related to the time of the medication, the type of medication, and the specific dosage of the medication. During early pregnancy, if the medication occurs within 2 weeks of fertilization, the effect on embryonic development is all or nothing, the drug may lead to embryonic arrest or miscarriage, or does not affect the embryo embryo normal development, the embryo is not abnormal. The period of 3 to 8 weeks after fertilization is highly sensitive to fetal teratogenicity. The risk of teratogenicity is also related to the dosage and type of drug used, usually with a short period of time the likelihood of teratogenicity is small, while the risk of teratogenicity increases with long-term use of the drug. The risk of teratogenicity of FDA class A and B is small, while the risk of teratogenicity of class C, D, and X is large. During the preparation for pregnancy and after pregnancy, you should pay attention to rest, avoid colds and flu, and be careful with medication. If you need to use medication, it is recommended that you consult a medical professional to avoid adverse effects.