title: Non-invasive first trimester antenatal diagnosis.
authors.forename: M D
authors.initials: MD
authors.lastname: Griffith-Jones
authors.forename: D
authors.initials: D
authors.lastname: Miller
authors.forename: R J
authors.initials: RJ
authors.lastname: Lilford
authors.forename: J
authors.initials: J
authors.lastname: Bulmer
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012732:Sex Determination Analysis / Q000379:methods*