Whether or not a pregnant woman’s medication has any effect on the fetus needs to be judged according to the type of medication and the time of use. If the instructions for the use of drugs, written clearly belong to the cautious use of drugs, and is not prohibited for pregnant women, it is recommended to consult a doctor in a timely manner. If there are clear indications for the use of drugs, you need to choose the application of the drug according to the dosage and duration of treatment, and if it is clearly written that the drug is prohibited for use by pregnant women, it can not be applied, and it may be detrimental to the fetus. There are more drugs that have an effect on the fetus, such as sedative sleeping pills, which may induce congenital malformations in the fetus. Some hormone drugs, may cause fetal upper limb shortage. Hypoglycemic drugs, may cause fetal malformation or death. Some vitamin drugs, may cause fetal malformation, destruction of cartilage cells, cleft palate, eye malformation, brain malformation. For drugs that are clearly written on the instructions of the drug prohibited, absolutely can not be used, but the prudent use of drugs is recommended to consult a doctor in time.