title: Detection of pregnancies with trisomy 18 in screening programmes for Down's syndrome.
authors.affiliation: Department of Environmental and Preventive Medicine, Wolfson Institution of Preventive Mediclne, Medical College of St Bartholomew's Hospital, London, United Kingdom.
authors.forename: A K
authors.initials: AK
authors.lastname: Hackshaw
authors.forename: A
authors.initials: A
authors.lastname: Kennard
authors.forename: N J
authors.initials: NJ
authors.lastname: Wald
mesh_terms: D000649:Amniocentesis; D006063:Chorionic Gonadotropin / Q000097:blood; D004314:Down Syndrome / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control*; D004964:Estriol / Q000097:blood; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008403:Mass Screening; D011247:Pregnancy; D012307:Risk Factors; D006113:United Kingdom / Q000453:epidemiology; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins; D004964:Estriol