The fallopian tubes have the function of transporting sperm, picking up eggs and transporting fertilized eggs to the uterine cavity. Any factor affecting the function of the fallopian tubes, such as tubal insufficiency, umbilical atresia due to tubal moxibustion or tubal occlusion due to destruction of the tubal mucosa, can easily lead to infertility. In addition, secondary infections caused by appendicitis or postpartum or postoperative infections may also lead to tubal obstruction resulting in infertility. Ovarian factors: functional ovarian malignancy, ovarian endometriosis, cysts and other ovarian pathologies; hypothalamic-pituitary-ovarian axis dysfunction, which may cause anovulatory menstruation and amenorrhea; systemic diseases affecting ovarian function leading to anovulation. Uterus factors: congenital malformation of the uterus, submucosal fibroids tend to cause unevenness or post-pregnancy miscarriage; endometritis, endometrial tuberculosis, endometrial polyps, uterine adhesions, etc. affect fertilized egg implantation. Cervical factors: The amount and nature of cervical mucus are closely related to whether sperm can enter the uterine cavity; cervical polyps and cervical fibroids can block the cervical canal and affect the passage of sperm; narrowing of the cervical opening can also cause infertility. Vaginal factors: Scarring of the vagina after injury, congenital absence of vagina, transverse vaginal septum, and non-porous hymen can easily affect conjugal life and prevent sperm from entering.