Rett Syndrome is a unique development disorder which begins in early infancy, seen almost exclusively in girls. The child with Rett Syndrome is usually born healthy and shows an early period of apparently normal development until 6-18 months of life, when there is a slowing down of skills. A period of regression then follows when she loses communication skills and purposeful use of her hands. Soon, stereotyped hand movements, gait disturbances, and slowing of the normal rate of head growth become apparent. Other problems may include seizures and disorganised breathing patterns which occur when she is awake. There may be a period of isolation or withdrawal when she is irritable and cries inconsolably. Over time, motor problems may increase, while other symptoms, decrease or improve. Many children are misdiagnosed with cerebral palsy or autism. There is no known cause, treatment or cure for Rett Syndrome.