This is interesting!
So it's confirmed that over 80% of those on the spectrum are firstborns.
Also, I understand that it's genetic.
So if a person has only one kid, there would be a higher chance of their only offspring having it, meaning a higher chance of most of their grandkids having it.
_________________
Logical Sensory Extrovert (ESTj) . Enneagram 1-6-2
Protestant . Female . Asexual . self-diagnosed Aspie
I enjoy charts, knitting, gaming, and interacting with real but atypical people.