title: Cell-free DNA Analysis for Noninvasive Examination of Trisomy.
authors.forename: Mary E
authors.initials: ME
authors.lastname: Norton
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Wapner
mesh_terms: D004247:DNA / Q000032:analysis*; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D048208:Nuchal Translucency Measurement; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*
chemical_list: D004247:DNA