Placental localizatin by ultrasound.
D005260:Female; D006801:Humans; D008722:Methods; D010920:Placenta / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011247:Pregnancy; D011859:Radiography; D011868:Radioisotopes; D014463:Ultrasonography
D011868:Radioisotopes