Fragile X Syndrome (FXS)
Fragile X syndrome (FXS) is one of the most common causes 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.
Learning What Families Need
Learn what CDC and partners are doing to learn more about FXS, one case at a time.
How Fragile X Is Inherited
Researchers at CDC are working to better understand how this complex condition affects individuals and their families.
Page last reviewed: January 3, 2022