Premarital medical examination includes medical history, physical examination, routine auxiliary examination and special examination. Asking medical history, to ask both men and women’s history of disease, any acute and chronic infectious diseases, heart disease, hypertension, diabetes, mental illness and important organ disease history, and ask whether there is a history of genetic disease in the immediate family. Then a general physical examination is performed, including height, weight, routine blood pressure, pulse, etc. Routine ancillary examinations include chest X-ray, routine blood, urine, hepatitis B, syphilis, HIV, liver function, kidney function, and other related tests. Special examinations include examination of both male and female genital organs. Females need to have a double examination, and if a vaginal examination is needed, it needs to be done with the consent of the person or the family. Men need to be checked for abnormalities of the reproductive organs, such as prepuce, penile sclerosis, cryptorchidism, etc. Other special examinations include routine semen, chromosomal examinations, and tests for sexually transmitted diseases.