I am not going to say you cannot RP being pregnant or wanting kids, but I am going to ask you to consider the theme, the world you live in, whether it's corpie or mixer, and the constant threat of violence and terrorism, and then I want you to consider that we cannot codedly support children nor do we want to subject young children NPCs to RP in this game.
So, should you decide you want to become pregnant, you are agreeing that Cerberus will come along and make sure that your unborn child cannot be born, one way or another, and I usually do this in a very themely and violent way to dissuade other people from making this RP choice.
That being said, Other GMs and staff members may not want to go down that path as killing unborn children as a part of their RP may not be something they want to even acknowledge as a 'thing'
Other players may not want to hear about what you went through when something horrible happens to your unborn child, I don't even know why you would want to RP that type of emotional trauma in the first place.
All that said, I am here for you, if you want to suffer emotionally, and go through that RP train wreck waiting to happen, I am ready to terminate any fetuses after a couple months of pregnancy RP.
If this post dissuades you from considering pregnancy as an option in SD, thank you for making me not have to kill another unborn mixer or corpie.