How about impreg?
If you've played the game you might've noticed that one of the characters is developing/discovering a breeding kink. Now I'm not going to pretend like you'll be able to get every girl pregnant during the game, the idea is to have some of the endings focused on a particular girl and their particular content. So there'd be an oops-all-bimbos ending and an oops-all-preggers ending. There will be a few characters who might get pregnant earlier but there's a lot of context behind that statement. If you're looking for a game heavily focused on impregnation, I'm sorry this isn't it. If you're looking for a game that has some impregnation/breeding content, in about two weeks when the new release goes public there's going to be some of the earlier content for that particular character.