title: [Prenatal studies of trisomy 21: triple test more efficient than age criterion].
authors.forename: A
authors.initials: A
authors.lastname: Drenthe-Schonk
mesh_terms: D003362:Cost-Benefit Analysis; D004314:Down Syndrome / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D018566:Pregnancy, High-Risk; D011296:Prenatal Diagnosis / Q000191:economics; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins