Camping. February 2010. Neither Karen nor I knows the root cause of Nathan's delay in speech development. Neither does his pediatrician, his teacher, either of his speech therapists, or any of the neurologists or other specialists we have taken him to. But Nathan's situation is not unique. Today there are literally hundreds of thousands of children with comparable delays in speech from a variety of undiagnosed causes. They are not autistic. They do not have broad cognitive development delays. But they are all on their own unique, remarkable journeys. Read more.