Before deciding to do IVF, both partners must undergo a comprehensive medical examination, including general physical examination and special examinations: Male and female 1, liver and kidney function, if abnormalities must be treated first 2, blood routine 3, pathogenic examination, including hepatitis B, hepatitis C, AIDS, syphilis, etc. Male semen examination (each center has slightly different examination items, not only semen routine, but also semen quality examination) according to the situation, choose IVF or ICSI Female 1, routine gynecological examination 2, ultrasound to observe the uterus and adnexa, to exclude adnexal cysts and other abnormalities Female partner 1. routine gynecological examination 2. ultrasound to observe the uterus and adnexa and to exclude adnexal cysts and other abnormalities 3. tubal iodography to exclude hydrosalpinx 4. blood sampling for sex hormone level to understand ovarian function 5. laparoscopy if necessary, etc.