Fourth month of pregnancy. Sounds like a prenatal test is in the works too.
I grew up in the 50’s and 60’s. I don’t recall any of the kids in any of my classes having autism.
There must have been some awareness of autism in the 50s, because there was an Elvis movie, with Mary Tyler Moore, I think, where Elvis was a doctor and MTM was a nun and there was an autistic little girl who was one of Elvis’ patients.