What is the prevalence of Down syndrome?

Updated: Apr 30, 2018
  • Author: Gratias Tom Mundakel, MBBS, DCH; Chief Editor: Maria Descartes, MD  more...
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Down syndrome is the most common autosomal abnormality. The frequency is about 1 case in 800 live births. Each year, approximately 6000 children are born with Down syndrome. [15] Down syndrome accounts for about one third of all moderate and severe mental handicaps in school-aged children. The prevalence of Down syndrome worldwide has increased because of increases in life span in the last few decades.

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