There are many clinical causes of infertility. The following conditions can cause infertility: 1. Repeated abortions cause damage to the endometrium, resulting in incomplete or complete adhesions in the uterine cavity. Even if the adhesions are separated under hysteroscopic surgery, it is still difficult for the fertilized egg to settle, which can cause infertility in clinical practice. 2. Chronic inflammation of the pelvic cavity caused by lack of hygiene during sexual life or menstruation or a history of uterine operations. This leads to a large amount of exudation, which causes adhesions in the fallopian tubes and clinically prevents sperm and eggs from combining, so it also leads to infertility. 3. Chronic inflammation in the local cervical area caused by operations such as IUI and IUD removal, so it leads to chronic inflammation with a large number of white blood cells, which can 㖔 phage sperm, so it also leads to infertility. Therefore, the causes of infertility are very complex, and clinically, once infertility is diagnosed, a detailed examination should be done. Once the cause is found, the appropriate treatment can be given and there is a chance of pregnancy in the clinic.