Not everyone with Fragile X has the same signs and symptoms, or to the same degree. Even affected children in the same family can have different signs and symptoms. These differences often make Fragile X hard to diagnose. However, because everyone with Fragile X has too little FMRP, they do share a pattern of certain physical, social, mental, and sensory characteristics. Although most of the Fragile X research to date has focused on children, adults with Fragile X also have most of these signs and symptoms.

In general, the signs and symptoms of Fragile X fall into five categories:

Intelligence and learning Physical Social and emotional Speech and language Sensory Disorders commonly associated or sharing features with Fragile X

Now consider each category in more detail.

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