Ovarian factors Inadequate follicular development in the ovary, inability to ovulate and form corpus luteum, premature ovarian failure, polycystic ovaries, ovarian tumors and other factors affecting follicular development or egg discharge may cause infertility. The uterus factor Congenital dysplasia or malformation such as absence of uterus, infantile uterus and solid uterus without cavity can affect the fertility of women. Posterior or severe retroflexion of the uterus, endometrial inflammation, and uterine adhesions are all causes of infertility. About 75% of patients with endometriosis have a history of infertility. Uterine fibroids are the most common benign tumors in women. The infertility rate of patients with uterine fibroids can reach 40%, which is much higher than the general infertility rate. Vaginal factors such as vaginal atresia or vaginal septum, hymenal atresia, etc. Cervical factors Cervical stenosis, polyps, tumors, adhesions, etc., and endocervical laxity are also among the common causes of habitual late abortion leading to infertility. V. Fallopian tube factors Whether the fallopian tubes are too long or narrow, tubal inflammation causing luminal occlusion, fluid accumulation or adhesions, they can prevent the movement of sperm, eggs or fertilized eggs. Tubal disease is an important cause of infertility and can account for 25% of female infertility. Endocrine factors Hypothalamic maturation or delayed maturation of the hypothalamic cycle center, resulting in imperfect regulation of the hypothalamic-pituitary-ovarian axis, manifesting as anovulatory menstruation, amenorrhea or luteal dysfunction, are all possible causes of infertility. In addition, hyper- or hypothyroidism and hyper- or hypoadrenocorticism can also affect ovarian function and hinder ovulation. Congenital factors Severe congenital hypoplasia of the reproductive system, often accompanied by primary amenorrhea; sex chromosome abnormalities, such as Turner’s syndrome, true and false hermaphroditism; chromosomal abnormalities resulting in habitual abortion, etc. Eight, systemic factors nutritional disorders, metabolic diseases, chronic wasting diseases, simple obesity, etc. Consumption of raw cotton seed oil, toxic chemicals, radiation exposure and microwave and other physical factors. Nine, psychoneurological factors Autonomic nervous system dysfunction, psychosis, environmental amenorrhea, anorexia nervosa and pseudopregnancy, etc.