title: Chorionic villus sampling and early amniocentesis for prenatal diagnosis.
authors.forename: P
authors.initials: P
authors.lastname: Johnson
mesh_terms: D000649:Amniocentesis / Q000009:adverse effects; D015193:Chorionic Villi Sampling / Q000009:adverse effects; D000075202:Contraindications; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*