Transabdominal chorionic villus sampling.
D000005:Abdomen; D002824:Chorionic Villi / Q000648:ultrastructure; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*; D013048:Specimen Handling / Q000379:methods*