title: Down syndrome and maternal age.
mesh_terms: D000328:Adult; D002675:Child, Preschool; D004314:Down Syndrome / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D007223:Infant; D008423:Maternal Age; D011446:Prospective Studies; D012189:Retrospective Studies