title: First-trimester diagnosis of genetic metabolic disorders.
mesh_terms: D000649:Amniocentesis; D002824:Chorionic Villi / Q000201:enzymology*; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008661:Metabolism, Inborn Errors / Q000175:diagnosis* / Q000201:enzymology; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*