A series of careful examination will be carried out in the case of couples who have decided to do IVF, and the physical condition of men also determines the success rate of IVF. For men, these examinations are as follows: 1. Semen examination, which is one of the most important examinations for men when they undergo IVF, including semen quality as well as the examination of pathogens such as chlamydia, gonococcus, etc. The examination will be carried out in accordance with the requirements of the IVF program, and will be carried out in accordance with the requirements of the IVF program. Semen quality generally includes three items of semen routine, malformation rate, and white blood cells, and it is necessary to ovulate 3-7 days in advance before the semen examination, otherwise it may affect the judgment of semen quality. For patients with poor semen quality, sex hormone and genetic examination may also be needed.2. Reproductive system examination, including penis, testicles, epididymis, etc., aims to exclude reproductive system diseases, such as hypospadias, cryptorchidism, etc.3. Blood-related examination, mainly including blood type, hepatitis B, hepatitis C examination, syphilis spirochete, HIV examination, etc.