You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Rett's syndrome is characterized by all except: and explain in detail?
Rett's syndrome Rett's syndrome is a rare developmental disorder of females which bears more resemblance to a neurodegenerative disorder than a psychiatric condition * Till 5-month development is normal Microcephaly Loss of acquired hand function and speech The loss of purposeful hand movements are replaced by stereotypic motions such ashand wringing Poorly coordinated gait and ataxia * Breathing problems--hyperventilation, breath holding, and sighing--are common, and help to distinguish Rett's from autism.