. Show Affiliations »
Abstract
Mesh: See more » Down Syndrome/diagnosisFemaleFetal Diseases/diagnosisGenetic TestingGestational AgeHumansPregnancyPrenatal DiagnosisRisk Factors
Year: 1991 PMID: 1830232 PMCID: PMC1670221
Source DB: PubMed Journal: BMJ ISSN: 0959-8138