That's like making me choose between my children (Ha)
But seriously, best overall game with Pregnancy? Four Elements Trainer. Best use OF the kink? Love Sex and Second Base.
God I wish Monster Girl Island didn't fade into the background and never get finished...
Princess and Conquest is amazing though, and still updated constantly. Corrupted Kingdoms isn't as good, but it's a lot better for casual play.
I stand by a rule of three for this, if you're expected to play more than three times, it's too grindy, unless it's gambling as an option for money with other options, love gambling