Eugenics is the hope and responsibility of every family, and the responsibility of eugenics falls unavoidably on young couples. For the husband, the quantity and quality of sperm is the key element of eugenics, thus sperm is called the essence of eugenics. Therefore, any factor that affects the quality of sperm, the husband should try to exclude; all the conditions conducive to eugenics, the husband should actively create. 1, timely treatment of reproductive system diseases: In the male reproductive organs, the testes are the “factory” to create sperm, the epididymis is the “warehouse” to store sperm, the vas deferens is the “traffic hub”. The spermatic cord is the “transportation line” for logistical supply, and the prostatic fluid is the “lubricant” necessary to transport sperm. When these key parts fail, eugenics is bound to be affected. For example, people with bilateral cryptorchidism or congenital hypoplasia of the testicles are unable to produce normal sperm. If inflammation, tuberculosis, or tumors occur in the testes, epididymis, or seminal vesicles, causing testicular atrophy and tissue destruction, most sperm are waste products. Varicocele, prostatitis, partial defect of vas deferens, hypospadias, impotence, premature ejaculation and other disorders can make the wife infertile. There are also venereal diseases such as syphilis and gonorrhea that can directly or indirectly affect the production, development and mobility of sperm, causing some harm to fertility. Therefore, the husband should first treat the reproductive organs in a timely manner. 2, quit bad habits: smoking, alcoholism, drug addiction not only affects health, but also is the enemy of eugenics. Smoking more than 10 cigarettes a day, its body sperm activity significantly decreased, and with the increase in smoking, the sperm deformity rate is also a significant increase in the trend. Excessive alcohol consumption causes alcohol poisoning in the body, causing changes in the morphology and activity of sperm, and can even kill sperm, which can affect conception and embryo development. For this reason, the deformed children conceived on weekends as a result of couples having sex after drinking are called “Sunday babies” abroad. It has been shown that 60% of fetuses conceived after drinking are congenitally mentally retarded. In general, the male spermatogonial cells develop into mature sperm, it takes about 80 days, and couples who are about to conceive offspring must quit smoking and drinking during this time. In recent years there has been an increasing trend of smoking men in China, and the resulting perinatal deaths are not uncommon. This often leads to intrauterine growth retardation, premature birth, fetal distress, increased incidence of mentally handicapped children, endangering families and society. 3, abstain from sex: Frequent sex is bound to make semen scarce, and the quantity and quality of sperm will be reduced and lowered accordingly. In order to ensure the normal conception of new life, the couple abstain from sexual intercourse is very necessary, especially the male side, more important to nurture the essence. This, especially for newlyweds with high sex drive should be noted. 4, avoid exposure to harmful substances: scientific research shows that many physical, chemical and biological factors acting on the human body, the reproductive function will produce damage to chromosomal abnormalities, sperm deformities, affecting the normal conception of the fetus. The exposure to lead, benzene, xylene, gasoline, vinyl chloride, X-rays and other radioactive substances, pesticides, herbicides, narcotics, etc. can cause chromosomal abnormalities in the fetus and increase the rate of miscarriage. 5, careful use of drugs: good medicine is good for the disease, and some drugs in the treatment of disease, but also damage to reproductive function, resulting in congenital malformations of the fetus, such as morphine, streptomycin, mitomycin, cyclophosphamide, etc. have adverse effects on sperm. Whenever sperm-damaging drugs are taken for treatment, the conception of new life must be avoided to avoid lifelong regrets. As the causes of sperm abnormalities are very complex, patients should consult an experienced male doctor, especially Chinese medicine is more unique in treating these diseases .