title: Second trimester chorionic villus (placental) biopsy.
mesh_terms: D000293:Adolescent; D001707:Biopsy, Needle; D002648:Child; D002824:Chorionic Villi / Q000032:analysis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D019896:alpha 1-Antitrypsin Deficiency