The gene deletion is located on the mecp2 area. Check with your doctor for details. Period of normal development between 6-18 months. Normal head circumference at birth, followed by slowing of head growth between 6 months and 4 years. Severely impaired expressive and receptive language.
Intellectual development appears to be delayed, but true intellegence is difficult to masure.
Loss of purposeful hand skills at 1-4 years. Repetitive hand movements including hand washing, wringing, clapping and hand mouthing, which can become almost constant while awake. Slow physical growth. Decreased body fat and muscle mass. Abnormal sleep patterns.