Ectopic pregnancy can occur for a number of reasons, such as inflammation of the fallopian tubes, history of tubal pregnancy or surgery, tubal dysplasia or abnormal function, adoption of assisted reproductive technology, and contraceptive failure. Ectopic pregnancy, also called ectopic pregnancy, refers to the fertilization of the egg in a part of the uterine body outside the cavity, with tubal pregnancy being the most common. The causes of ectopic pregnancy mainly include the following aspects: 1. Tubal inflammation, tubal inflammation is the main cause of tubal pregnancy. With tubal inflammation, it will lead to tubal mucosal adhesion, narrowing of the lumen or impaired cilia function, which is the fertilized egg in the tubal lumen operation is blocked, so that ectopic pregnancy is prone to occur. 2. History of tubal pregnancy or surgery, if there is a history of previous tubal pregnancy, no matter conservative treatment or surgical treatment, the chances of recurrence of tubal pregnancy are relatively high. 3. Tubal dysplasia or abnormal function, if the fallopian tube is too long, or the lack of mucosal cilia, poor development of the muscle layer, tubal diverticulum, there is a tubal parasphernalia, etc., may cause ectopic pregnancy. If the function of the fallopian tube is abnormal, it will affect the normal operation of the fertilized egg, and ectopic pregnancy may also occur. 4. Assisted reproductive technology, the application of assisted reproductive technology, so that the incidence of tubal pregnancy increased. 5. Contraceptive failure, if there is a birth control device in the uterine cavity, or oral emergency contraceptive pills, if the contraceptive failure, the chances of ectopic pregnancy increase. It is recommended that patients seek medical treatment in a timely manner, so as not to delay the condition of the body to cause serious effects.