Does asperger's syndrome worsen? do the symptoms increase in intensity, especially during or near puberty?

Of course: The young aspie child who was fascinated with train schedules was "cute". At puberty, the lack of physical coordination / team sports aptitude, odd speech & interests, & inability to understand others / poor social aptitude become far more obvious and cause the individual much pain as the physical and emotional needs of the new teen suddenly erupt. Good guidance is everything.