title: First trimester screening--new directions for antenatal care?
authors.forename: Lyn S
authors.initials: LS
authors.lastname: Chitty
authors.forename: Tze Kin
authors.initials: TK
authors.lastname: Lau
mesh_terms: D002869:Chromosome Aberrations; D000013:Congenital Abnormalities / Q000175:diagnosis; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011295:Prenatal Care / Q000639:trends*; D011296:Prenatal Diagnosis / Q000639:trends*