title: The declining prevalence of anencephalus and spina bifida: its nature, causes and implications.
authors.affiliation: University of Glasgow, Social Paediatric and Obstetric Research Unit.
authors.forename: D H
authors.initials: DH
authors.lastname: Stone
mesh_terms: D000032:Abortion, Therapeutic; D000757:Anencephaly / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D004739:England; D006801:Humans; D009656:North America; D011296:Prenatal Diagnosis; D016136:Spina Bifida Occulta / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology