Generating robust stem cells via SCNT, also called therapeutic cloning, was not considered a practical option before the breakthroughs by Mitalipov, Egli et al. The approach was further tainted by the scandal surrounding Korean scientist Hwang Woo-Suk’s claims of success in cloning cell lines in 2005. A majority of scientists and the public also believe that reproductive cloning should be banned. (The U.S. still has no law that outlaws reproductive cloning.)

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