Factors that particularly increase risk of ectopic pregnancy include Prior ectopic pregnancy Prior abdominal or pelvic surgery, particularly tubal surgery, including tubal ligation Tubal abnormalities Current intrauterine device (IUD) use In vitro fertilization in current pregnancy Pregnancy is much less likely to occur after tubal ligation or IUD placement; however, when pregnancy does occur, risk of ectopic pregnancy is increased (eg, about 5% in current IUD users).