title: A new approach to antenatal diagnosis.
mesh_terms: D000649:Amniocentesis; D002824:Chorionic Villi / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D010920:Placenta / Q000648:ultrastructure*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*