Fragile-X syndrome
Fragile-X syndrome is the most common cause of inherited mental impairment. It affects about one in 5000 boys and about one in 2500 girls. As well as learning difficulties, people with Fragile-X may have other symptoms, including anxiety and hyperactivity. Boys are usually more severely affected than girls. Diagnosis of Fragile-X syndrome is important, as special education and therapy can help affected children.
