The following sites are parent support organizations in English. Some may have limited resources in other languages.
There are many neurodevelopmental disorders, many of which can result in autism or autism spectrum disorders. For example, fragile X syndrome is the most common, known single gene cause of autism. It is important to remember that autism is a behavioral diagnosis while many of the other neurodevelopmental disorders are medical conditions. Again, fragile X syndrome is a good example. An individual can receive the behavioral diagnosis of autism and, later, a blood test can determine that the cause of the autism is the medical condition of fragile X syndrome. In this example, the individual has autism for which the cause is fragile X syndrome. That is, both diagnoses are correct.
Not all neurodevelopmental disorders result in autism, but it is important to talk to your child’s doctor about testing for neurodevelopmental disorders, even when a diagnosis of autism has been given.
Autism Parenting Magazine
Fragile X Syndrome
National Fragile X Foundation
National down syndrome society
The International 22q Foundation