He actually does, good catch
Not only that, but it also results in higher suspicion score when you finish the night
I'm not the one pulling the steings so I can't promise anything, besides, dev hasn't said anything about endings nor pregnancy more than that
All in all there's too little info regarding this matter, for now we can only assume things, like condoms could prevent pregnancy or maybe he will add some other contraceptives
I'll try to mention that if the time comes to it
Cheers