Some experts in the field think that we've improved our ability to diagnose autism and diagnose it early (as this article also mentions). That's been one explan

Some experts in the field think that we've improved our ability to diagnose autism and diagnose it early (as this article also mentions). That's been one explanation for the increase in autism diagnoses. I agree that genetics probably haven't changed enough to account for the entire increase in diagnoses, so there's a counter-explanation.