Doctors always caution women who are pregnant or trying to get pregnant to stop smoking immediately, not to drink too much alcohol, and not to take random medications. But the effects of smoking and alcohol on male fertility are often overlooked. The relationship between smoking and deformed sperm has been described in a leading British medical journal. Doctors in infertility clinics have found a decrease in the number of normal sperm among smokers, with an average decrease of about 10%. The incidence of deformed sperm is significantly higher if you smoke 21-30 cigarettes per day, and even higher if you smoke more than 30 cigarettes. The longer you smoke, the more deformed sperm there will be, and as the number of normal sperm continues to decrease, sperm motility will also be weakened. It has been analyzed that it is likely that the toxic substances in the smoke act in the body to damage the genes that regulate sperm production, which then causes the sperm morphology to change. More than 5,000 pregnant women have been analyzed and it was found that when the husband smokes more than 10 cigarettes a day, the prenatal mortality rate of the fetus increases greatly, and the more he smokes, the higher the mortality rate. The birth rate of congenital malformations in pregnant women whose husbands smoked was about 2.5 times higher than in those whose husbands did not smoke. The “European Center for Impotence Research” in Paris has given more than 400 middle-aged impotent patients for penile blood pressure index measurement, found that in patients with organic impotence, 53% is arterial vascular damage, and, other factors ultimately through the arterial blood vessels to transport blood to the impact. It is well known that smoking can cause atherosclerosis, and studies have shown that two-thirds of impotent patients smoke. A French physician, after investigation, concluded that the arterial insufficiency that causes impotence is mainly due to smoking and poor diet. He proposed that these patients quit smoking and drink less alcohol, which would help restore normal sexual function. Some studies have also shown that smoking and alcohol abuse in male adolescents can delay the maturation of male sexual characteristics. Alcohol abuse has a greater impact on the reproductive system, mainly in the following areas: long-term alcohol consumption can cause low male fertility; excessive alcohol consumption to induce prostatitis, and even secondary dysfunction, and can cause infertility; British researchers recently pointed out that alcohol abuse can impair reproductive endocrine function, accelerate testosterone metabolism, resulting in a relative increase in estrogen, due to the reduction of active androgens, testicular atrophy, impotence can occur . Alcohol can damage sperm, damaged sperm if fertilized, it often affects the development of the fetus in the womb, causing miscarriage, and sometimes give birth to deformed fetus, or the child is born with poor intelligence, becoming an imbecile. Foreign children of this kind are called “Sunday children”, which is considered to be the evil consequences of alcoholism on weekends. The problem of poor fetal development caused by alcohol abuse has long attracted attention, and the evil effect of alcohol is considered to be the “wrong child”. Experts who raised male mice with reaction stops, alcohol, lead, and narcotics and then mated them with females found that the mice born had a higher mortality rate and a higher incidence of birth defects. This suggests that drugs, alcohol, etc. can affect and damage sperm, and that drugs, etc. that enter the semen and act through the vaginal wall into the woman’s body may also cause abnormal development of the fetus. Therefore, experts infer that there is also a relationship between a woman giving birth to a deformed child and her husband taking drugs. It is advisable for men who want to become fathers not to smoke, drink too much alcohol or take drugs during their wives’ pregnancy for the sake of your future children’s health.