title: First trimester prenatal diagnosis: chorion villus sampling or amniocentesis?
authors.forename: J P
authors.initials: JP
authors.lastname: Neilson
authors.forename: C M
authors.initials: CM
authors.lastname: Gosden
mesh_terms: D000649:Amniocentesis / Q000379:methods; D015193:Chorionic Villi Sampling / Q000379:methods; D000013:Congenital Abnormalities / Q000175:diagnosis*; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*