title: First-trimester ultrasound screening for chromosomal defects.
authors.affiliation: Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK.
authors.forename: R J
authors.initials: RJ
authors.lastname: Snijders
authors.forename: S
authors.initials: S
authors.lastname: Johnson
authors.forename: N J
authors.initials: NJ
authors.lastname: Sebire
authors.forename: P L
authors.initials: PL
authors.lastname: Noble
authors.forename: K H
authors.initials: KH
authors.lastname: Nicolaides
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations / Q000000981:diagnostic imaging*; D025063:Chromosome Disorders; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D004314:Down Syndrome / Q000000981:diagnostic imaging; D004487:Edema / Q000000981:diagnostic imaging; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D009333:Neck / Q000000981:diagnostic imaging / Q000196:embryology; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D018566:Pregnancy, High-Risk; D014424:Turner Syndrome / Q000000981:diagnostic imaging; D016216:Ultrasonography, Prenatal