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Published online 21 June 2005 | Nature | doi:10.1038/news050620-4
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'Ripened eggs' used for cloning work
Immature human eggs could be a source of stem cells.
Researchers have managed to make the beginnings of a cloned human embryo using immature eggs incubated in the lab. If the technique can be perfected, they say it could provide a larger, more acceptable source of stem cells.
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