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Published online 3 July 2007 | Nature | doi:10.1038/news070702-8
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Mice born from cloned sperm
Technique raises hopes for infertile men.
Cloning might one day restore the fertility of men with severely low sperm counts, say researchers in the United States who have cloned mouse sperm and used it to create apparently healthy adult mice.
Embryologists at Cornell University's Weill Medical College in New York cloned the sperm using similar methods to those used to clone whole animals, most famously Dolly the sheep.
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