first time using a broody hen to hatch eggs...have a question

I think I may have made a mistake because I added fertilized eggs to the pile of eggs my broody hen was sitting on; each egg was laid about a week apart. I know now that was the wrong thing to do, but I'm wondering if I can remove each egg as it hatches and place it in my brooding box (already set up and used successfully several times for purchased day old chicks). That way the broody hen would still have the remaining eggs to hatch. Anyone have advice?