A British scientist has produced sperm cells from female embryonic stem cells, and they’re going to try using bone marrow cells next.

http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2008/01/31/scisperm131.xml

No babies with two genetic mommies yet, though; they have to figure out how to get the sperm cells to go through meiosis.

A team in Brazil, meanwhile, has made eggs from male mice.

This is all going to make sexuality in the future very interesting…