Patient's choice between transcervical and transabdominal chorionic villus sampling.
D002824:Chorionic Villi / Q000473:pathology*; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013048:Specimen Handling / Q000379:methods