Pregnancy is kinda tricky when it comes to creating games, especially for games that are more light hearted. That said, here is a link to my discord in which I have a channel dedicated to pregnancy games in the community. Be warned though, most are nsfw.
If your looking for a sfw pregnancy focused game, one I would recommend is “Seeds of Fate”. That was the game that actually inspired me to create seeds of destiny. I believe there is still a download somewhere on deviantart for that particular game.
Also the fertile farm game here on weight gaming is pregnancy based too.