Arvi: si tu nous sors l'argument d'autorité experte "ma mère qui est pédo psychiatre et qui bosse sur l'autisme depuis 15 ans", on a juste a fermer nos gueules puisque tu sais bien mieux que nous pauvres cons.

Ceci dit, si tu restes réceptif aux opinions différentes de la tienne, citation (sourcée de manière multiple) du blog thelogicofscience:

I will point out that there is a large body of evidence showing that most, if not all, of the increase in autism rates is due to changes in how autism is diagnosed (Rutter 2005; Taylor 2006; Bishop et al. 2008; Baxter et al. 2015; Hansen et al. 2015). In other words, autism rates are higher now than they were in 1990 because people who would not have been considered autistic in 1990 are considered autistic today (Dr. Novella wrote a good post on this several years ago that includes some additional sources).