Who Is Affected by Down Syndrome
Reference Down syndrome Opens New Window occurs in all cultures, ethnic groups, socioeconomic levels, and geographic locations.
- About 1 out of 733 babies born in the U.S. has Down syndrome.Reference 2
- The risk of a 20-year-old woman having a baby with trisomy 21-type Down syndrome is 1 in about 2,000. By age 45, a woman's risk for having a child with this type of Down syndrome is 1 in 20.Reference 1
|By:||Reference Healthwise Staff||Last Revised: July 20, 2011|
|Medical Review:||Reference Susan C. Kim, MD - Pediatrics
Reference Louis Pellegrino, MD - Developmental Pediatrics