I have played many games that have pregnancy in the game, very few actually show them with a baby bump, or actually have the child.
Now off the top of my head games that show pregnancy like Summertime Saga, 23 Sisters, Almost Dead, Blended Family, Grandma's House.... are somewhat rare.
Most games that have pregnancy... like Knockout Master, Away From Home, The Fiery Scion... those stories will say a girl is pregnant, however the story moves so slowly it is unlikely you will see anything happen.
Even fewer games will actually have the children.. 23 Sister, Summertime Saga, Almost Dead, and Corrupted Kingdoms come to mind. Now Summertime Saga just puts the kids in day care and keeps a tally of how many kids you have... because you can knock up several girls over and over again.... well the old version anyway.
Corrupted Kingdoms is one of the few that lets you visit your kids and interact with them to a degree.... it handles having more kids with the same girl very weird..
23 Sister is a very weird game, you can have kids, but they "grow up" very fast so you have more Loli love interests.... very weird game.
My personal preference is like The Fiery Scion, the MC tries to impregnate many girls (Harem Game), and you don't really have to deal with it much, girls get pregnant, but game takes forever to do anything do no real time jumps (I have suggested that there should be some time jumps weeks, maybe a month or so, just to get things moving)
But at end of the day if there is a child born, like in Almost Dead.... then it changes the sex dynamic... because no you need to have areas you can do it. But I am fine with pregnancy in games however the developer wants to handle it. I personally am not into pregnant sex. But when I play a game like Grandma's House I have my MC just go with everything, just to see what is in the game. I will say that doing Maria in the kitchen of the pizza place in Summertime Saga while she was pregnant was pretty damn hot.
peace.