Fragile X Syndrome is the most common known inherited cause of learning disabilities, affecting around 1 in 4000 males and 1 in 8000 females. It can cause a wide range of difficulties with learning, as well as social, language, attentional, emotional, and behavioural problems. In addition, approximately 1 in 250 females and 1 in 600 males are carriers of the fragile X pre-mutation. Some carriers may develop symptoms of one of the two Fragile X-associated Disorders. Therefore, fragile X consists of a family of three genetic conditions.

One of the aims of the Fragile X Society is to provide support to families affected by fragile X, through providing information about the conditions. Therefore, we have a broad range of information available to you.