title: Primary ovarian pregnancy and the intrauterine device.
abstract: Two new cases of ovarian pregnancy are reported in relation to use of the intrauterine device, bringing the total number of reported cases to 18. Theories concerning the failure of the IUD to reduce the number of ovarian pregnancies are discussed.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D010053:Ovary; D011247:Pregnancy; D011271:Pregnancy, Ectopic