The causes of ectopic pregnancy include: i. Repeated abortions. The more abortions you have, the greater the chance of ectopic pregnancy, so whether you are a fertile woman or not, you should do a good job of contraception to prevent ectopic pregnancy from striking. Second, chronic pelvic inflammatory disease. Especially tubal inflammation is another important factor in the development of ectopic pregnancy, and women should not ignore this common gynecological disease. Third, IUD. About 3% of women with IUDs still get pregnant, so even if you have an IUD and have symptoms of abdominal pain, you should consider ectopic pregnancy. IV. History of ectopic pregnancy. Women who have a history of ectopic pregnancy are more likely to have another ectopic pregnancy. V. In vitro fertilization. Normal pregnancy can lead to ectopic pregnancy, and likewise IVF can lead to ectopic pregnancy. Therefore, women who are ready to do IVF should treat gynecological diseases beforehand to prevent ectopic pregnancy and improve pregnancy rate.