My understanding is that the test for Fragile X is the only "real test" that helps determine autism. If you have Fragile X, you generally have autism.
I never got around to having my son tested for it. He has no physical characteristics of it and, frankly, I was tired of testing. I just didn't see how it would help us parent him any better.
Here is a quote section from the National Fragile X Organization:
- FACT: For between 2% and 6% of all children diagnosed with autism, the cause is the Fragile X gene mutation.
- FACT: Approximately one-third of all children diagnosed with fragile X syndrome also have some degree of autism.
- FACT: Fragile X syndrome is the most common known single gene cause of autism.
www.fragilex.org
