Study turns skin tissue from infertile men into early-stage sperm cells
Posted: 01 May 2014, 22:25
![Image](http://static.guim.co.uk/sys-images/Guardian/Pix/pictures/2014/5/1/1398961951394/Live-sperm-seen-through-a-011.jpg)
Study turns skin tissue from infertile men into early-stage sperm cells
Researchers at Stanford convert skin cells into stem cells, which became human sperm cells when transplanted into mice's testes.