My daughter is 19 months old, and cannot walk. She has also experienced 2 siesures since she turned 1. No one has any clue what could be wrong with her. Some doctors suggest autism, but I don't see many of the symptoms and similarities. What else could it be? She has been tested for nearly everything, but nothing has come back positive. She has also had chrom. tests to see if it was down syndrome. but everything came back fine. Any suggestions on what it could be? I'm at my witts end not knowing. If I knew what it was, I could deal with it.