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Nature 442, 858 (24 August 2006) | doi:10.1038/442858b; Published online 23 August 2006

Early embryos can yield stem cells... and survive

Helen Pearson

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Could extraction technique resolve ethical problems?

A single cell can be teased from a human embryo and used to produce stem cells while leaving the embryo intact. The process, published online in Nature this week, could enable stem-cell lines to be generated without the controversial destruction of human embryos — but some ethical objections remain.