Researchers hope technique will resolve political, ethical concerns.
The new method works by taking an embryo at a very early stage of development and removing a single cell, which can be coaxed into spawning an embryonic stem cell line. With only one cell removed, the rest of the embryo retains its full potential for development
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http://www.cnn.com/2006/HEALTH/08/23/stem.cell.ap/index.html