How Common Is Down Syndrome? Key Facts & Statistics

Discover how common Down syndrome is, its occurrence rates, risk factors, and available screening methods for expecting families.

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Down syndrome is relatively common, affecting about 1 in every 700 babies born in the United States. It occurs across all races and economic levels, making it one of the most common chromosomal conditions. The likelihood of having a baby with Down syndrome increases with maternal age, especially after the age of 35. Early screening and diagnostic tests are available and can provide families with important information for care and support.

FAQs & Answers

  1. What is the likelihood of having a baby with Down syndrome? Down syndrome affects about 1 in every 700 babies born in the United States, although the risk increases with maternal age, especially after 35.
  2. Are there tests to detect Down syndrome before birth? Yes, there are early screening and diagnostic tests available during pregnancy that help detect Down syndrome and provide important information to families.
  3. Does Down syndrome occur in all populations? Yes, Down syndrome occurs across all races and economic levels, making it one of the most common chromosomal conditions worldwide.

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