Sorry i wrote console but it was Visual Studio's console. Not the game console. I don't know how you can check or even use the game's console (It do not really work for me)
And sorry for the late reply, i forgot to set this topic as "watched" so i did not received notices.
So basically to make it clear. In the game, you have an Class that is called `Hero`. Every hero in the game is an object of this class. In the class you have many variables that define each hero, like his name and everything. In those variables you have a few related to children and pregnancy, one of them is `isFertile`, it can be set to true or false and it's set at the hero/character creation. So basically in your save there should be somewhere this variable stating what the value is. But you are asking something above my capacity as how the game stores values is a bit complicated.
I personally think it's way much easier to make a simple mod, turn this true than start editing your save.