Fragile X syndrome (FXS) is the most common known cause of inherited intellectual disability. CDC is working to learn more about fragile X syndrome and fragile X-associated disorders to improve the health and well-being of people with these conditions.
- Centers for Disease Control and Prevention
National Center on Birth Defects and Developmental Disabilities
Division of Human Development and Disability
1600 Clifton Road
Atlanta, GA 30333
TTY: (888) 232-6348
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