Rudimentary egg and sperm cells made from stem cells

Some hope that sperm cells could one day be derived from the skin cells of a man who is otherwise sterile - and that a similar process cold produce viable egg cells from a sterile woman's body. Israeli and UK researchers have created human sperm and egg precursor cells in a dish, starting from a person's skin cells.

http://www.nature.com/news/rudimentary-egg-and-sperm-cells-made-from-stem-cells-1.16636