title: Chorionic villus sampling in first trimester and fetoscopy in second trimester.
mesh_terms: D002824:Chorionic Villi / Q000473:pathology*; D005260:Female; D005332:Fetoscopy; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*