I have had HG with all 3 pregnancies. Only 1 child is autistic (Asperger's, specifically). That one also was vaccinated till 9 mos. Only this current pregnancy has been medicated w/ Zofran, Phenergan, Reglan, and Pepcid.
Max's autism wasn't triggered by the shots, either. I knew that boy was different before he was even born. I just KNEW him. Max's IQ testing is still in progress but we've been told it's very high. The adults in his life (educators, doctor) are very impressed with it already and we haven't gotten the final number.
Rachel is not autistic. But she is ahead of her peers in school. She was not vaccinated, either, but as I stated regarding Max, I don't believe the shots trigger it for our family. (I have a cousin w/ Asperger's and my husband shows many of the signs as well.)
Given that my son is on the Spectrum without drugs during HG, I don't think it's connected. Not for us, anyway.
I'm expecting this baby any day now and it's been my first medicated HG pregnancy. I hope this baby isn't autistic. I say that because I see the challenges Max is faced with and I don't wish it on anyone.
It's hard to accept that our kids are different, but somehow we keep going and they bless us with their differences.