Prenatal diagnosis of genetic defects.
D002824:Chorionic Villi / Q000648:ultrastructure; D002869:Chromosome Aberrations / Q000175:diagnosis*; D025063:Chromosome Disorders; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods