This website makes an interesting assertion. What would happen if all Christians started praying for amputees to regrow lost limbs?
No matter how many people pray. No matter how sincere those people are. No matter how much they believe. No matter how devout and deserving the recipient. Nothing will happen. The legs will not regenerate. Prayer does not restore the severed limbs of amputees. You can electronically search through all the medical journals ever written -- there is no documented case of an amputated leg being restored spontaneously. And we know that God ignores the prayers of amputees through our own observations of the world around us. If God were answering the prayers of amputees to regenerate their lost limbs, we would be seeing amputated legs growing back every day.