while i do like knocking people up in games, they are androids so it probably would be streching it, (maybe some sort of upgrade you can give them instead of it being already there????????????) and another game i've played does allow you to knock up some girls, they also made it so the kids grow up fast and needed a day care to be taken care of, and if you dont yeet them into another dimension, you can't get the girls pregnant again, and if you did you would just have a bunch of childen in another dimension.
long story short pregnancy is hard to handle in types of games where its a side feature where you can do it any time, rather than a story thing
OK it was just an idea figured since you have to fuck them might as well turn them into a type of bio-synthetic being and let them experience something like motherhood... I have an idea about that. You could make it so that pregnancy is optional. Anyway you don't have to send them to a new dimension just have it so that the daughters are like their mother (workers and servers) and sons would be a type of security/military force.