title: Biochemical screening tests for Down syndrome.
authors.forename: E
authors.initials: E
authors.lastname: Coetzee
authors.forename: D
authors.initials: D
authors.lastname: Viljoen
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood; D004314:Down Syndrome / Q000175:diagnosis*; D004964:Estriol / Q000097:blood; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000191:economics / Q000379:methods*; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins; D004964:Estriol