The process isn't cheap: approximately $600 dollars for the initial extraction (parents can't just wait for the teeth to fall out; they need to be pulled out by a dentist) and then around $100 annually for storage. That's a lot to go through, physically and financially, for something that no one is sure has practical use. Dr. John Kessler, a neurologist with Northwestern Medicine, said, "There is virtually no medical or scientific rational for a parent doing this. It's to make the parents feel guilty about doing something, which is never going to help the child. It is not the right type of stem cells. There will be other sources of stems cells available."