Rett Syndrome (RS) is a neurological disorder that occurs almost exclusively in girls. Most of these girls begin their lives just like your daughter or grand-daughter with each girl developing normally for 6-18 months. Many learn to walk, talk, feed themselves and even potty-train only to lose these skills later during the hallmark regression of RS. These girls are then left with lifelong impairments – locked in a body that no longer responds. There is no known cure.