Prenatal genetic diagnosis by chorionic villus sampling (CVS).
D002404:Catheterization / Q000295:instrumentation; D002824:Chorionic Villi / Q000032:analysis*; D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D014465:Ultrasonics