[What's the cause of the increasing incidence of Down's syndrome?].
D000328:Adult; D003718:Denmark; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D018566:Pregnancy, High-Risk
Hvad er årsagen til den øgede forekomst af Down's syndrom?