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Down Syndrome

Down syndrome is a genetic condition that causes a number of physical and intellectual differences.

Children born with Down syndrome have an extra chromosome 21 in all the cells in their bodies. This extra chromosome changes how a baby’s body and brain develop.

With the right health care and support, many children with Down syndrome enjoy long, happy, full and independent lives.

Down syndrome: what you should know 

  • Down syndrome is one of the most common genetic conditions, occurring in one in 800 to one in 1,000 births.
  • Children with Down syndrome usually have mild to moderate intellectual disability. They tend to reach their milestones, such as first words, crawling and walking, later than other children.
  • Children with Down syndrome have an increased risk for a number of other health conditions, which can include the following:

Departments and programs that treat this condition