title: Letter: Report of Down's syndrome during a period of suspected increase in trisomy 18.
mesh_terms: D000328:Adult; D002902:Chromosomes, Human, 16-18; D002904:Chromosomes, Human, 21-22 and Y; D003120:Colorado; D004314:Down Syndrome / Q000453:epidemiology* / Q000235:genetics; D005260:Female; D006801:Humans; D008423:Maternal Age; D009518:New York; D012621:Seasons; D014314:Trisomy