title: Markers in prenatal ultrasound debated.
authors.forename: Tracy
authors.initials: T
authors.lastname: Hampton
mesh_terms: D004314:Down Syndrome / Q000000981:diagnostic imaging; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D012306:Risk; D016216:Ultrasonography, Prenatal