Smoking and drinking will reduce the success rate of pregnancy preparation. Smoking and drinking will reduce the quality of sperm and lead to sperm abnormalities, such as giant sperm, double-headed sperm and double-tailed sperm. Once pathological sperm can't get pregnant normally, even if they get pregnant normally, it will lead to abortion or fetal hypoplasia. If pregnant women drink and smoke, it is easy to cause hormone secretion disorder and irregular menstruation.

2. Smoking during pregnancy affects male sperm, and smoking or drinking will affect male sperm quality and sperm activity. Harmful substances in tobacco will reduce sperm motility, not to mention alcohol. Long-term excessive drinking has a great influence on sperm. In addition, drinking alcohol will increase the rate of male sperm malformation. Not only is it not easy to get pregnant, but even if a woman is successful in pregnancy, she is prone to miscarriage due to sperm problems, and even affects her future baby, leading to some congenital diseases.

Drinking is harmful to the future fetus. Ethanol in alcohol is converted into acetaldehyde, and nicotine is also dissolved in the blood. If you don't quit smoking and drinking during pregnancy, these harmful substances will remain in the body, which will have an impact on the development of the central nervous system in the future. It is very easy to cause fetal malformation. Long-term drinking will lead to low fertility in men. Excessive drinking can induce prostatitis, even secondary dysfunction, and can cause infertility. Long-term drinking will lead to the decrease of testicular atrophy and testosterone levels in men. Men's long-term drinking will cause alcoholism, which will lead to the decrease of sperm quantity, the decrease of sperm vitality, the increase of deformity rate and sperm mortality, and seriously affect reproductive capacity. Women's long-term drinking will lead to irregular menstruation and stop ovulation.

Drinking is harmful to the future fetus. Ethanol in alcohol is converted into acetaldehyde, and nicotine is dissolved in the blood. If you don't quit smoking during pregnancy, these harmful substances will remain in the body, which will affect the development of the central nervous system of the fetus in the future and easily lead to fetal malformation. Smoking and drinking will lead to decreased resistance. Smoking and drinking during pregnancy can easily cause colds, lung infections, gastroenteritis and other diseases, and the resistance will decline. You can't get pregnant immediately if you get sick and take medicine during pregnancy. Some drugs are easy to remain in the body, affecting fetal development.