When a foreskin is removed from a baby, doctors can (with parents' permission) use the skin for important medical purposes. Doctors can replace skin on someone with burns or with foot sores caused by diabetes. Foreskins that have been removed can be used for medical research. A foreskin that has been cut off can be used to test new drugs and to find cures for diseases. The small piece of skin that was cut off can grow a huge amount of new skin, enough to cover several football fields. In the future, it may be possible to grow other parts of the body from this skin.