title: Ultrasonic diagnosis of abnormal pregnancy.
mesh_terms: D000033:Abortion, Threatened / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006828:Hydatidiform Mole / Q000175:diagnosis; D008722:Methods; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D014463:Ultrasonography; D014594:Uterine Neoplasms / Q000175:diagnosis