title: Estimating risk of Down's syndrome.
authors.forename: H S
authors.initials: HS
authors.lastname: Cuckle
authors.forename: N
authors.initials: N
authors.lastname: Wald
authors.forename: J
authors.initials: J
authors.lastname: Densem
mesh_terms: D004314:Down Syndrome / Q000517:prevention & control*; D005260:Female; D005820:Genetic Testing; D006801:Humans; D011247:Pregnancy; D012307:Risk Factors