title: Sonography and magnetic resonance imaging in the diagnosis of cervico-isthmic pregnancy.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis* / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal