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Fragile X Syndrome: Condition Information

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What is Fragile X syndrome?

Fragile X syndrome is a genetic disorder that affects a person’s development, especially that person’s behavior and ability to learn. In addition, Fragile X can affect:
  • Communication skills
  • Physical appearance
  • Sensitivity to noise, light, or other sensory information

Fragile X syndrome is the most common form of inherited intellectual and developmental disability (IDD)

People with Fragile X syndrome may not have noticeable symptoms, or they can have more serious symptoms that range from learning disabilities to cognitive and behavior problems.

Last Reviewed: 10/29/2013
Vision National Institutes of Health Home BOND National Institues of Health Home Home Storz Lab: Section on Environmental Gene Regulation Home Machner Lab: Unit on Microbial Pathogenesis Home Division of Intramural Population Health Research Home Bonifacino Lab: Section on Intracellular Protein Trafficking Home Lilly Lab: Section on Gamete Development Home Lippincott-Schwartz Lab: Section on Organelle Biology