Guanciali-Franchi, Paolo Optimal cut-offs for Down syndrome contingent screening in a population of 10,156 pregnant women. [electronic resource] - Prenatal diagnosis Dec 2012 - 1147-50 p. digital Publication Type: Evaluation Study; Journal Article ISSN: 1097-0223 Standard No.: 10.1002/pd.3974 doi Subjects--Topical Terms: AdolescentAdultCohort StudiesDown Syndrome--diagnosisFalse Positive ReactionsFemaleHumansInfant, NewbornMass Screening--methodsPopulationPregnancyPregnancy Trimester, First--physiologyPrenatal Diagnosis--methodsReference ValuesRetrospective StudiesUltrasonographyYoung Adult