The premarital examination includes: 1. medical history, including current health status, past illnesses, especially those affecting marriage and childbirth, and the presence of smoking, drinking and drug addiction. 2. physical examination, including weight, blood pressure, development of secondary sex characteristics, function of the heart, lungs, liver, spleen and other important organs, and the presence of organic diseases. 3. family history, the presence of genetic diseases, infectious diseases, including sexually transmitted diseases, mental diseases, etc. 4, 4. Examination of the genitalia, male side: testes, epididymis, spermatic veins, scrotum, penis, prostate, and the presence of hermaphroditic abnormalities. The female partner is examined for vaginal atresia, uterine development and gynecological inflammation affecting fertility.5. Auxiliary examinations include routine blood and urine tests, eight infectious diseases, including AIDS, syphilis, hepatitis B and C, and liver and kidney function tests. According to the patient’s condition, guidance on sexual life and contraception, and guidance on marriage and childbirth.