It affects only females. The exact cause of the trait is unknown, but it has been linked with a metabolic disorder. The prevalence of Rett's disorder is 6 to 7 cases per 100,000 females. During the first five months the child is developmentally on track. From six months to two years the child's condition deteriorates.
Treatment is geared toward symptom relief.
Behavior therapy is used to control respiratory difficulties and teach self coping mechanisms. The girl can become totally unable to care for herself. Call your health care provider if you have any concerns about your child's development, if you notice a lack of normal development with motor or language skills in a child, or if there are associated disorders that need treatment.