First, and foremost, the rise in autism rates is due to more sensitive instruments, a broadening of some inclusion criteria between DSM 4 and 5, more awareness of autism, less stigma associated with autism, services attached to autism diagnosis. I believe current research suggests these don't account for all the rise, but does account for most of it.
If I were to include additional biological possibilities, I'd include: a) birth control -> waiting to have children until a later age, more de novo mutations due to age. b) assortive mating, since some careers tend to attract those on the within and on the edges of the spectrum., c) perhaps controversially, and with the very little research on the subject, endocrine disruption from plastic waste exposures.
> If I were to include additional biological possibilities, I'd include: a) birth control -> waiting to have children until a later age, more de novo mutations due to age.
Surely it should be easy to collect the data to plot such a hypothesis: incidence rate vs age of father and vs age of mother at conception, and at birth.
Severe autism is on raise as well, and that has stable diagnoses over several years. Plus general cognitive decline in last a few decades is also documented.
Is it politically correct to write about later stage pregnancies? It would be insta ban only a few years ago.
Perhaps soon we will be able to openly discus something else, that may cause endocrine disruption, not just plastics!
@SubiculumCode - replying as you are a researcher in this field. There is an increase in profound autism globally (I think this is the new naming to differentiate severe autism) which isn’t explained by sensitive instruments or inclusion criteria. You just don’t need them to identify profound autism, it is that obvious. Affected people need caregivers for life also causing severe mental and financial stress. It will only help your research to investigate this increase which perhaps will lead to medical breakthroughs.