A person who has a normal sexual life and has not had a pregnancy for one year without contraception is said to be infertile. Ovulation disorders and tubal factors are the most common factors in female infertility. 1. Ovulation disorder: 25%-35%. Ovulation dysfunction leads to ovulation, and the main causes are: (1) Hypothalamic-pituitary-ovarian dysfunction, including organic lesions or dysfunction of hypothalamus and pituitary gland. (2) Ovarian lesions: such as congenital ovarian dysplasia, polycystic ovary syndrome, premature ovarian failure, functional ovarian tumors, etc. (2) Fallopian tube factors: blockage of fallopian tubes or tubal incompetence accounts for about 50% of female infertility factors. Chronic tubal inflammation causing umbilical atresia or destruction of tubal mucosa can cause complete blockage of fallopian tubes leading to infertility. In addition, tubal insufficiency, pelvic inflammatory disease sequelae, endometriosis can also lead to tubal infertility. 3, uterine factors: uterine malformation, submucosal fibroids, endometritis, endometrial tuberculosis, endometrial polyps, uterine adhesions, etc. can affect the fertilization of eggs and lead to infertility. 4. Cervical factors: abnormal secretion of cervical mucus, cervical inflammation and abnormal immune environment of cervical mucus can affect the passage of sperm, which can cause infertility.