35 days of pregnancy within the drug, no effect on the fetus for the following reasons: First, the mother’s body to the absorption of drugs have a process, the drug into the mother’s body will undergo a certain amount of dilution, in order to enter the body of the fetus, the drug into the body of the fetus after the concentration of the drug has been very low, this time to take medication on the fetus is no effect. Second, because of their own immune system and protective measures, the blood-brain barrier can block the drug into the fetus, or into the fetal nervous system, will absorb part of the drug to reduce the harm to the fetus. Third, most of the side effects of the drugs taken by the fetus are very small and will not cause harm to the fetus. Fourthly, the liver and kidney of the fetus itself also have certain functions of detoxification and detoxification, and taking drugs has no effect on the fetus.