"Why do we need therapeutic cloning? As a layman, several important reasons come to mind. One, implantation of human embryonic stem cells is not safe unless they contain the patient's own DNA. Two, efforts, to repair central nervous system disorders may need to recapitulate the process of fetal development, and that could only be accomplished by human embryonic stem cells. Three, therapeutic cloning is done without fertilizing an egg. It can be strictly regulated. If we also enforce an absolute ban on reproductive cloning, we will not slide down the dreaded slippery slope into moral and ethical chaos. Any powerful new technology comes with the possibility for abuse. But when we decide that the benefit to society is worth the risk, we take every possible precaution and go forward. The unfertilized eggs that will be used for nucleus transplantation will never leave the laboratory and will never be implanted in a womb. But if we do not make this research legal, if we do not use Government funding and oversight, it will happen privately, dangerous unregulated and uncontrolled."