I'm currently planning on sticking with the standard stuff (anal, vaginal etc.)
But I also plan on doing some polls in the future for special scenes that people would like to see in the game. If the demand is there, then preg is definetly an option.
Yes. Do polls. Do not listen to beggars spamming their fetish wishes everywhere. They distort the apparant popularity of such things.
Pregnancy in particular is a rather unwieldy fetish because of the ingame time it would take. It also breaks immersion for casual care free sex. In a world where women get pregnant, those women also use condoms and have to prepare for anal sex.