title: [Prenatal screening for Down's syndrome--moving from the second to the first trimester of pregnancy].
authors.forename: R
authors.initials: R
authors.lastname: Maymon
authors.forename: A
authors.initials: A
authors.lastname: Herman
authors.forename: C
authors.initials: C
authors.lastname: Dreazen
authors.forename: I
authors.initials: I
authors.lastname: Bukovsky
authors.forename: Z
authors.initials: Z
authors.lastname: Weinraub
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000196:embryology*; D005260:Female; D006801:Humans; D008403:Mass Screening; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis; D016216:Ultrasonography, Prenatal