title: [Diagnosis of trisomy 21: a simple blood test?].
authors: L-J
authors: LJ
authors: Salomon
mesh_terms: D015415:Biomarkers / Q000097:blood*; D004247:DNA / Q000097:blood; D004314:Down Syndrome / Q000097:blood*; D005260:Female; D005312:Fetal Blood / Q000737:chemistry; D006801:Humans; D008423:Maternal Age; D048208:Nuchal Translucency Measurement; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D012307:Risk Factors
chemical_list: D015415:Biomarkers; D004247:DNA