title: The importance of placental localization preceding amniocentesis.
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects; D000650:Amnion; D004906:Erythrocyte Count; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005331:Fetomaternal Transfusion / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D010920:Placenta / Q000293:injuries; D011247:Pregnancy; D011677:Punctures; D014463:Ultrasonography