Prof Karim Nayernia, professor of stem cell biology at the city's university, has already coaxed male bone marrow cells to develop into primitive sperm cells, and has repeated the feat with female embryonic stem cells.
He plans to apply for permission to turn the bone marrow cells of a woman into sperm.
This work raises the possibility of lesbian couples having children: sperm created from the bone marrow of one woman could be used to fertilise an egg from her partner.
full story and source here: http://www.telegraph.co.uk/earth/main.jhtml?view=DETAILS&grid=&xml=/earth/2008/02/12/scisperm112.xml
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