There are many causes of infertility, which can be divided into the following major categories. The first category is inflammatory in nature, such as uterine adhesions, tubal inflammation, blocked fallopian tubes, etc. caused by various gynecological inflammatory diseases. The second category is congenital dysplasia, often with abnormalities of genetic material, such as Crohn’s sign, small uterus or vaginal atresia. The third category is endocrine disorders, such as hyperandrogenemia, polycystic ovary syndrome, hyperprolactinemia, etc. The fourth category is immunological causes, such as positive anti-sperm antibodies, positive anti-endometrial and ovarian antibodies, abnormal closed antibodies, etc. in women. It is best to go to the hospital for a comprehensive examination to identify the cause and then treat it reasonably to cure it. If the fallopian tubes are incompetent, this requires an imaging test and laparoscopic surgery can be considered; if the endocrine disorder, reasonable hormonal medication can be taken to regulate it.