Autism spectrum disorder has no single known cause.
It’s most likely a combination of different factors that are still not properly defined.
The evidence of a genetic predisposition has been proven.
For a parent, the most important is not to know the cause but rather to be able to figure out how the future of their child will look like.
The most odd hypotheses were discussed.
The selected theories are: genetic, neurobiological and environmental.
Researches are still carried on.