title: Gestational dating and Down's syndrome screening.
authors.forename: G E
authors.initials: GE
authors.lastname: Palomaki
authors.forename: J E
authors.initials: JE
authors.lastname: Haddow
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins