title: The sonographic detection of trisomies 13, 18, and 21.
authors.affiliation: Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, School of Medicine, Pennsylvania, USA.
authors.forename: L M
authors.initials: LM
authors.lastname: Hill
mesh_terms: D000886:Anthropometry; D002869:Chromosome Aberrations / Q000000981:diagnostic imaging*; D025063:Chromosome Disorders; D002882:Chromosomes, Human, Pair 13; D002887:Chromosomes, Human, Pair 18; D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012307:Risk Factors; D014314:Trisomy; D016216:Ultrasonography, Prenatal