title: Diagnostic use of ultrasonics in abortion. A study of 250 patients.
mesh_terms: D000022:Abortion, Spontaneous / Q000175:diagnosis*; D005260:Female; D005865:Gestational Age; D006801:Humans; D006828:Hydatidiform Mole / Q000175:diagnosis; D007744:Obstetric Labor Complications; D010920:Placenta; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D013997:Time Factors; D014463:Ultrasonography