Occasional use of drugs does not have a significant impact on the fetus, but prolonged use of drugs may lead to fetal malformation. It is recommended to take good care during pregnancy preparation and not to be exposed to harmful substances and various drugs to avoid abnormalities. Especially in the first trimester when the fetus is in the most important period of growth and development, improper use of medication or protection may lead to miscarriage or fetal malformation. This will directly affect the subsequent growth of the fetus, so pregnant women must pay special attention to this, and it is recommended to pay more attention to rest during pregnancy. If there are diseases arising it is best to consult a doctor first, you can take drugs under the guidance of a doctor is relatively less harmful, it is best not to take drugs indiscriminately.