35 days of pregnancy when the fertilized egg has been in the uterine cavity of the bed, the use of drugs will have a corresponding impact on the fetus, so must be careful with the use of drugs, not within 35 days of pregnancy will not have an impact on the fetus, do not blindly listen to, so as not to cause serious consequences. Because there are some drugs that can be used by pregnant women and will not affect the fetus, but there are some drugs that can lead to fetal malformations, so the use of drugs must be careful and under the guidance of a doctor, with clinical indications before using drugs for treatment. It is recommended that after pregnancy, both medication and diet should be paid special attention to, diet if not careful may also cause miscarriage, such as eating barley or crab may have an impact on the fetus.