title: Chorionic villus sampling and early amniocentesis for prenatal diagnosis.
authors.forename: A
authors.initials: A
authors.lastname: Greenough
authors.forename: K H
authors.initials: KH
authors.lastname: Nicolaides
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects; D015193:Chorionic Villi Sampling / Q000009:adverse effects; D005260:Female; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D011446:Prospective Studies