Studies have tried to link it better than just “both numbers have risen over time”, but even in those cases it’s just “the percentage difference between mothers who took Tylenol and mothers who didn’t is slightly higher”. The small correlation could likely be explained by the correlation between autism and other health problems, which would make mothers who were more genetically susceptible to autism slightly more likely to have a condition causing chronic pain, which they would take meds for
Tbh I agree. We have evidence people w/ adhd and autism (both allegedly correlated to fetal Tylenol exposure) feel pain more strongly/more likely to experience chronic pain. Thus autistic mothers, who may not even be currently diagnosed for a lot of reasons (thanks medical sexism) would be using Tylenol more often. And since we know there’s a strong genetic link, their kids are more likely to also have that disorder