Letter: Ectopic pregnancy and the I.U.D.
D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D010049:Ovarian Diseases / Q000150:complications / Q000209:etiology; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000209:etiology*; D012488:Salpingitis / Q000150:complications / Q000209:etiology