Sonographic features of placental complications in pregnancy.
D000037:Abruptio Placentae / Q000175:diagnosis; D005260:Female; D005865:Gestational Age; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology*; D010922:Placenta Diseases / Q000175:diagnosis*; D010923:Placenta Previa / Q000175:diagnosis; D011247:Pregnancy; D014328:Trophoblastic Neoplasms / Q000175:diagnosis; D014463:Ultrasonography; D014594:Uterine Neoplasms / Q000175:diagnosis