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Scientists in Pennsylvania yesterday said they had turned ordinary mouse embryo cells into egg cells in laboratory dishes -- an advance that opens the door to creating "designer" eggs from scratch and, if repeated with human cells, could blur the biological line between fathers and mothers.
The work undermines the standard model of parenthood because the scientists made egg cells not only from female cells, but also from male cells, indicating that even males have the biological capacity to make eggs.
If the science holds true in humans as in mice -- and several scientists said they suspect it will -- then a gay male couple might, before long, be able to produce children through sexual reproduction, with one man contributing sperm and the other fresh eggs bearing his own genes.
(via the Michelangelo Signorile Show)