Accelerated pregnancies? In my fantasy game? Lizardmen and Orcs, those are fine, but that would just be absurd! Actually, better scrap the whole premise of the game, I don't think anyone with Karryn's personality would turn into a slut that fast.
This logic is silly. What game with day systems make you wait 270 in game days for the pregnancy content rofl.
Just make them pop out in 12 days or whatever, CCmod is a good idea of what a pregnancy system could look like.
Edicts after you defeat the level 2 boss, just like in CCmod, could easily "logically" effect things like pregnancy chance and speed. The infirmary is currently unused unless I'm mistaken. That would be a pretty good locus for this kind of thing.
You don't have to bring "realistic" pregnancies into it, it's a fetish for a porn game.