Symptoms usually include intellectual disabilities, ranging from mild to severe, attention deficit and hyperactivity, anxiety and unstable mood, and autism.
Fragile X is caused by a defect in a single gene. This gene, called FMR1, shuts down and fails to produce a protein vital for brain development.
A DNA test for Fragile X is available. This blood test is accurate and can detect carriers and fully-affected individuals. Any doctor can order the test.
There is currently no cure for Fragile X, although appropriate education and medications can help maximize the potential of each child.