The main causes of female infertility The main causes of female infertility can be summarized as follows: Ovulatory dysfunction, which is manifested by the absence of ovulation during the menstrual cycle or, although ovulation occurs, the corpus luteum does not function properly after ovulation. Tubal factors: long or narrow fallopian tubes, blockage, fluid accumulation or adhesions in the fallopian tubes can prevent the movement of sperm, eggs or fertilized eggs. Tubal disease can account for 25% of female infertility and is an important cause of infertility. Ovarian factors: ovarian insufficiency, luteal insufficiency, premature ovarian failure, polycystic ovary syndrome, ovarian tumors and other factors affecting follicle development or egg discharge can cause infertility. Cervical lesions: congenital abnormalities, atresia or stenosis of the cervical canal, polyps, erosion, tumors and adhesions can affect the passage of sperm; the presence of anti-sperm antibodies in the cervical mucus is detrimental to sperm penetration of the cervical canal or completely disables sperm motility. Nowadays, radiofrequency intervention can effectively treat cervicitis, cervical erosion and polyp hypertrophy. Congenital abnormalities in the development of reproductive organs or acquired pathologies of reproductive organs that impede the patency and function of the reproductive channel from the vulva to the fallopian tubes, preventing the sperm from meeting the egg and leading to infertility. Immunological factors: These refer to the presence of anti-sperm antibodies in the female reproductive tract or serum, which cause sperm to agglutinate with each other, lose their vitality or die, leading to infertility or sterility. In addition, some infertile women have antibodies to their own egg zona pellucida in their serum, which can prevent sperm from penetrating the egg for fertilization and can cause infertility. Infertility caused by sexual dysfunction, lack of sexual knowledge, systemic diseases and unknown causes account for about 1/3 of the causes of infertility.