According to MedlinePlus, Fragile X syndrome is the most common form of inherited developmental disability and is caused by a change to a specific gene that makes a protein needed for brain development. This change causes a person to make little or none of this protein. Those with a small change in the gene may not show signs of Fragile X, while those with a bigger change may have severe symptoms. The symptoms of Fragile X syndrome include learning disabilities, intellectual disabilities, social and emotional issues, and speech and language issues. Although there is no cure for Fragile X, symptoms may be treated with educational, behavioral, or physical therapy, and with medications.
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