Vaginosonographic guided chorionic villi needle biopsy (transvaginal chorionic villi sampling).
D001707:Biopsy, Needle / Q000379:methods; D002824:Chorionic Villi / Q000473:pathology*; D005260:Female; D006801:Humans; D010922:Placenta Diseases / Q000473:pathology; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D014463:Ultrasonography; D014621:Vagina