title: [Introduction: maternal serum marker test for Down syndrome--present and problems].
authors.affiliation: Department of Obstetrics and Gynecology, Toranomon Hospital.
authors.forename: K
authors.initials: K
authors.lastname: Sato
mesh_terms: D015415:Biomarkers / Q000097:blood*; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis
chemical_list: D015415:Biomarkers