I've been thinking lately about how, given all his health problems, Steve was probably born prematurely (idk if it's canon or not, google's telling me no) and that he was a part of the Baby Incubator exhibit at Coney Island that ran from 1903 to 1941. And that's where my thought train ends idk. Thoughts?
Confession: I had never heard of the Baby Incubator exhibit at Coney Island until I got your ask, Anon. And while at first glance, it sounds disturbing and exploitative (and, okay, it kind of was, though it seems to have been for a good purpose), it also sounds like it a) saved the lives of many premature babies and b) changed neonatal care for the better.
As for your question, yes, I think it’s possible Steve was one of the Incubator Babies. I can’t think of any reason why he absolutely couldn’t be, so yeah, go ahead and add it to your head-canon or write it into a story!