Stem cells: How to make eggs and sperm

  title={Stem cells: How to make eggs and sperm},
  author={M. Azim Surani},
Afertilized egg is potentially immortal: this fusion of egg and sperm gives rise not only to a new individual, but also (theoretically at least) to an endless series of generations. Three groups now suggest that it is possible to generate both of these remarkable cells — known collectively as germ cells — in a culture dish. Geijsen and colleagues, writing on page 148 of this issue, and Toyooka et al., writing in Proceedings of the National Academy of Sciences, describe how they obtained sperm… CONTINUE READING