Infertility can be divided into two types: primary infertility and secondary infertility. Primary infertility is called infertility when there is no sign of pregnancy after a long period of conjugal life without any measures and without any contraceptive measures for more than 1 year, and patients who have never been pregnant are called primary infertility. There are many factors that can cause primary infertility, both male and female factors. The male factors are mainly semen abnormalities, sexual dysfunction, immune factors, etc. Female factors include: 1) vaginal abnormalities, developmental abnormalities such as hymenal atresia, stenosis, rigidity, congenital absence of vagina, longitudinal vaginal septum, transverse septum, vaginal stenosis or upper segment closure, etc., which may cause infertility; 2) uterine abnormalities, such as congenital absence of uterus, various uterine malformations such as unicornuate uterus, bicornuate uterus, double uterus, transverse and longitudinal uterus, infantile uterus, etc., which may cause Infertility; 3. Fallopian tube abnormalities; 4. Ovarian abnormalities.