There are many causes of infertility: 1. Ovulation disorders, tubal factors, semen abnormalities, uterine lesions, vaginal and cervical lesions, immune factors, etc. 2. Infertility caused by tubal factors accounts for 1/3 of female infertility factors, due to obstruction of the fallopian tubes or 3. Infertility occurs when there are no mature eggs during ovulation due to ovarian dysfunction. 4. Male infertility can be caused by abnormal semen, such as oligospermia, azoospermia, high sperm malformation rate or abnormal male sexual function. 5. Submucosal fibroids, endometrial inflammation, endometrial polyps, etc. can affect the fertilization of eggs and lead to infertility. 6. Inflammation of the cervix and vagina can also lead to infertility. 7. Immunological factors are also a common problem. In case of infertility, it is recommended that both spouses go to the hospital together for relevant examinations.