Do all girls move through the stages of Rett syndrome similarly?
No. The stages of Rett syndrome are simply provided to help understand the natural history of the disorder. The course of Rett syndrome is predetermined according to her mutation and X-inactivation status as well as other yet to be determined factors, and varies from one child to another, including the age when Rett begins and the speed and severity of symptoms. Therefore, two girls of the same age can appear quite different.
