Transabdominal placental biopsy.
D000022:Abortion, Spontaneous / Q000209:etiology; D001706:Biopsy / Q000009:adverse effects; D002824:Chorionic Villi / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy