title: Nuchal translucency measurement and second-trimester biochemical screening for Down's syndrome.
authors.forename: E P
authors.initials: EP
authors.lastname: Frohlich
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D006063:Chorionic Gonadotropin / Q000097:blood*; D018568:Crown-Rump Length; D004314:Down Syndrome / Q000097:blood* / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D008423:Maternal Age; D009333:Neck / Q000000981:diagnostic imaging / Q000196:embryology; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D012680:Sensitivity and Specificity; D012885:Skinfold Thickness; D016216:Ultrasonography, Prenatal
chemical_list: D015415:Biomarkers; D006063:Chorionic Gonadotropin