A woman’s pregnancy may be affected by a man’s drinking. Alcohol affects the quality of a man’s sperm, and if a poorer quality sperm combines with an egg, the quality of the fertilized egg will also deteriorate. During the development of the embryo, there may be stunted growth, embryonic arrest, miscarriage, fetal malformation and so on. Therefore, men should quit smoking and drinking during the preparation for pregnancy so as not to affect the development of the fetus. The development of the fetus will be affected by many factors, in addition to the male factors, the female should also pay attention to. Women should start taking oral folic acid tablets 3 months before preparing for pregnancy and continue to take them until the third month of pregnancy. During pregnancy, it is necessary to strengthen nutrition, pay attention to rest, and avoid staying up late and working hard. Pregnant women should also not smoke and drink, avoid exposure to harmful substances, and pay attention to regular obstetric examinations during pregnancy.