The Trisomy 21 Program

About Trisomy 21

Trisomy 21 (Down syndrome) is the most common chromosomal abnormality, occurring once every 800-1,000 live births. More than 350,000 people in the United States have Down syndrome. When your child is diagnosed with Down syndrome, you face a number of challenges that may overwhelm you.

Risks to your child

Your child is at higher risk for:

Deficits in any of these areas can negatively affect your child's development and adaptive behavior. Therefore, our team reviews both your child's medical background and development while evaluating your child's growth and behavior.

More information

For details about Down syndrome, our Trisomy 21 program at CHOP and more, please use the links below:


Date: October 2012

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