Ectopic pregnancy is caused by chronic tubal inflammation in about 1/3 of the patients in the clinic. As a result of chronic tubal inflammation, the lumen of the fallopian tube becomes narrow and the fertilized egg cannot pass through, causing the fertilized egg to settle and develop in the fallopian tube, resulting in ectopic pregnancy. In addition, due to abnormal development of the fallopian tube, for example, the fallopian tube is too long, the fertilized egg has already been deposited when it has not entered the uterine cavity, and ectopic pregnancy is also formed. There are other reasons, such as the wandering of the fertilized egg, which can also lead to ectopic pregnancy. In daily life, in order to avoid ectopic pregnancy, you should pay attention to the hygiene of sexual life and menstruation, mainly to avoid causing inflammation of the pelvis. If you are not planning to get pregnant, you must take contraceptive measures to avoid abortion causing pelvic inflammation.