Placental localisation by B-scan ultrasound in transabdominal amniocentesis.
D000328:Adult; D000649:Amniocentesis / Q000009:adverse effects; D000650:Amnion; D005260:Female; D005331:Fetomaternal Transfusion / Q000209:etiology*; D006801:Humans; D010920:Placenta; D011247:Pregnancy; D011677:Punctures / Q000009:adverse effects*; D014463:Ultrasonography