title: Chorion villus sampling and randomisation.
authors.forename: I Z
authors.initials: IZ
authors.lastname: MacKenzie
authors.forename: P
authors.initials: P
authors.lastname: Boyd
authors.forename: J
authors.initials: J
authors.lastname: Ferguson
mesh_terms: D000649:Amniocentesis; D002824:Chorionic Villi / Q000032:analysis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis