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Published online 21 October 2004 | Nature | doi:10.1038/news041018-12

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Biologists come close to cloning primates

Cloned monkey embryos transferred into mothers.

US biologists have created cloned monkey embryos, and successfully transferred them into monkey mothers. Although none of the resulting pregnancies lasted more than a month, this is by far the closest scientists have come to cloning a primate.

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