The pre-pregnancy checkup for men mainly includes three aspects: physical examination, blood test and semen test. 1. Physical examination: It is the responsibility of the genitourinary doctor, mainly checking the development of external genitals, whether there are deformities, diseases and other conditions. Some of the more common causes of infertility are varicocele, small testicles and cryptorchidism. 2. Blood test: check the general condition of the body: blood, liver function, kidney function, blood sugar, A function, blood type of the test, to assess the state of the man’s body; it also includes the test for sexually transmitted diseases and infectious diseases, such as syphilis, Hepatitis B, Hepatitis C, AIDS and so on, because it can be transmitted to the sexual partner and the next generation. 3. Semen routine: the most direct test to reflect fertility, need to abstain from sex for 2-7 days, the sperm’s vitality decreases, the number decreases, the abnormality rate increases are all causes of male infertility, also can be checked through the semen to see if infected with reproductive tract mycoplasma, chlamydia and gonococcus infections, these pathogens are also causes of infertility or embryonic sterilizations, abortion occurs. If a couple has not gotten pregnant after a year of cohabitation and no contraception, they should visit the Department of Reproductive Medicine as soon as possible for a conjugal examination to avoid delaying the pregnancy.