title: First-trimester diagnosis of maple syrup urine disease on intact chorionic villi.
mesh_terms: D001706:Biopsy; D002824:Chorionic Villi / Q000378:metabolism*; D003653:Decarboxylation; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D066298:In Vitro Techniques; D007651:Keto Acids / Q000378:metabolism; D008375:Maple Syrup Urine Disease / Q000175:diagnosis*; D011247:Pregnancy; D011261:Pregnancy Trimester, First
chemical_list: D007651:Keto Acids