[Etiology of ectopic pregnancy].
Zhang
H
H
Dai
Z
Z
D002585:Cesarean Section / Q000009:adverse effects; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D000292:Pelvic Inflammatory Disease / Q000150:complications; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000209:etiology*