While still a controversial subject, many stem cells in clinical trials today don't require the deliberate destruction of an embryo but can be obtained from adult tissues. (discovermagazine.com)
Each of these proposals has considerable merit as an alternative to the generation and destruction of embryos for research» yet for each there are also significant questions about scientific feasibility and ethical soundness. (firstthings.com)
Human iPS cells offer the possibility to generate a non-controversial source of patient - specific stem cells without destruction of embryos. (robertlanza.com)