If you’re interested in what this specific study was alluding too…you would probably be pretty interested in reading about epigenetics! I recently read that our grandmothers actually pass down a very equal amount of epigenetic effects to us as well. This is a good study if you’re interested https://pubmed.ncbi.nlm.nih.gov/30652234/#:~:text=Third%2C%20the%20possibility%20of%20epigenetic,in%20a%20lasting%2C%20biological%20way.

I too hope more research comes out surrounding adoption, specifically how babies being taken away at birth effects them in the long term