Try to devise a way of preserving his insights while avoiding the vicious regresses to which he can give rise.
By six months of development, this ridge extends all the way down to the groin, but then regresses.
Do not be surprised if the child regresses in behavior, such as wetting the bed.
Childhood Disintegrative Disorder: In this specific form of autism, the child begins to develop properly but regresses somewhat over time.
Moreover, if your child regresses, or loses abilities, you must consider it a potentially serious problem and insist on a professional evaluation.