Most female infertility is caused by the fallopian tubes, especially blocked fallopian tube infertility. The fallopian tubes are the “stronghold” for the passage of sperm, the union of sperm with the egg and the movement of the fertilized egg. Tubal obstruction is mainly caused by uterine cavity infection, endometriosis and other disorders, and various inflammatory stimuli and bacterial upstream infections causing local adhesions and obstruction of the fallopian tubes are also very common. Even if the egg has been fertilized, the inflammation of the fallopian tube restricts its peristaltic movement, which may lead to the fertilized egg staying in the fallopian tube and developing into an ectopic pregnancy, which can seriously threaten the life of women. What are the causes of tubal obstruction? 1, vaginitis does not heal: unclean sex and other reasons make inflammation repeatedly stimulated, germs upstream infection, caused by the fallopian tube tissue adhesion, blockage, until after marriage found infertility. 2, cavity infection: modern people have an open sex life, and do not pay attention to contraception, abortion is constantly occurring, plus in an irregular hospital, it is easy to cause cavity infection, some people even private medical abortion, resulting in incomplete abortion, had to scrape the uterus, the damage to the uterus is greater. Uterine cavity infection, endometrial damage, resulting in uterine adhesions, tubal obstruction. Generally speaking, abortion is performed in a regular hospital, according to the regular procedure, with regular post-operative antibacterial and treatment to promote the recovery of the uterus, there is no adverse effect on the health of women. Although abortion is a minor surgery, some complications or sequelae can occur, such as incomplete suction, uterine bleeding, uterine cavity adhesion, endometriosis, infertility, etc. Therefore, abortion should not be done more often, otherwise it will have adverse effects on health.