title: [Antenatal screening methods for chromosome 21 trisomy].
authors.affiliation: TAYS:n naistenklinikka PL 2000, 33521 Tampere.
authors.forename: M
authors.initials: M
authors.lastname: Päkkilä
authors.forename: M
authors.initials: M
authors.lastname: Niemimaa
authors.forename: P
authors.initials: P
authors.lastname: Kirkinen
authors.forename: M
authors.initials: M
authors.lastname: Ryynänen
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012680:Sensitivity and Specificity; D013997:Time Factors