For the adoption approval, we have to make a will which state to whom we entrust the care of our future children.
To entrust the care of your child to someone else, you must actually have a child that you can name in the will, or the will is not legally binding, according to legalzoom.com.
So, I called the adoption agency to ask what other couples do in the situation. The receptionist told me, "Well, most people just say "children that will be born to us.""
I had to laugh. But now I am annoyed.