title: NIH considers large-scale study to evaluate chorionic villi sampling.
mesh_terms: D001706:Biopsy / Q000379:methods*; D002824:Chorionic Villi / Q000473:pathology*; D000013:Congenital Abnormalities / Q000175:diagnosis*; D005260:Female; D006801:Humans; D009316:National Institutes of Health (U.S.); D010920:Placenta / Q000473:pathology*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography; D014481:United States