title: Choice between using delta-NT or NT MoM.
authors.forename: A R
authors.initials: AR
authors.lastname: Rudnicka
authors.forename: N J
authors.initials: NJ
authors.lastname: Wald
mesh_terms: D000465:Algorithms; D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D009333:Neck / Q000000981:diagnostic imaging; D011247:Pregnancy; D018570:Risk Assessment / Q000379:methods; D016216:Ultrasonography, Prenatal / Q000379:methods*