Alcohol consumption by men has an effect on the pregnancy of the woman, as it affects the quality of semen and sperm, resulting in a lower number of sperm or reduced vitality, which can greatly reduce the chances of pregnancy. The quality of the embryo may also be poor after pregnancy, and may cause pre-eclampsia, abnormal development, fetal abortion or malformation during the woman’s pregnancy, and may also have a great impact on the central nervous system of the fetus, which may result in developmental delay, mental retardation, heart defects or physical disability. Therefore, if the couple has a plan to have children, they must do eugenics, women need to take folic acid in advance, men are recommended to start quitting smoking and drinking three months before conception, actively exercise, and have a regular diet and rest, so that the quality of sperm can be improved.