title: Interstitial pregnancy: early diagnosis by ultrasonography.
mesh_terms: D000328:Adult; D005321:Extraembryonic Membranes / Q000473:pathology; D005187:Fallopian Tubes / Q000601:surgery; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011271:Pregnancy, Ectopic / Q000175:diagnosis*; D014463:Ultrasonography