Yeah good thoughts. Either it being standard that everyone is on BC or even sterilization makes sense. I may even end up going with something like that. Though it seems to be the case that the people in my story are not (despite their era) a whole lot more technological with their sex than we are now and their culture might resist something like mandatory sterilization. But if I fall out of love with the idea of condoms still being necessary that far out, I may go to everyone just being on some kind of "pill."