In Spike's Conception: Please Have My Babies, you don't make kids the traditional way. Instead, you and one of twelve girls place your "spirit" in a contraption of some form.
This is what the contraption looks like.
And this is what it looks like when a baby comes out of it.
The actual resulting baby, referred to as a "Star Child," is determined by the connections you have with the girl. You have to build up strong ties with the girl in advance via communication.
Here are some sample babies.
You'll form a thirteen member party with twelve of your kids for the game's battle system. Spike hasn't detailed the battle system yet, but it did share a bunch of screens today, along with some concept images and enemy artwork, which you'll find below.