what's the extent of the impregnation/pregnancy content? as of rn
It's been a little while since I've played, but most of the princesses can be courted and then visited at night, where you can impregnate them. Each princess ovulates differently, so the human ones are fertile a few weeks each month etc.
There's also a couple ways to have them leave the throne, like if their kingdom is destroyed you can rescue them, or if they have a child already, you can convince them to leave the kingdom to the child. Once they're in your party, some have special events, and you can use them in battle, have fun in camp, and impregnate them etc.
There's a bunch of extra princesses with other recruit conditions, and It's pretty random which princesses actually have content and how much content they have though. Like, Kobold princess (the one on the forum's thumbnail) you get in your party at the beginning, since her kingdom is destroyed in the tutorial, and she has the most events as far as I know.