Either, and you can use a text editor (like notepad) or the WMeditor to change how long pregnancy takes, how long until they'd show up in your dungeon, and even the odds of being a female. (also the odds of customers or yourself getting the girls pregnant). Plus you can make girl packs that can only be born as your daughter. that last feature is a little glitchy right now, but i'm sure it works fine anyway. (the only glitch i've encountered recently is that some unique girls have been using their filename as their name instead of the specified name in the girlsx.)