The race to make human sex cells in the lab.

The article discusses the possibility for scientists to create eggs and sperm from skin and blood cells. Topics include the possibility that the use of artificial cells could transform reproduction more radically, the participation of developmental biologist Mitinori Saitou in the most groundbreaking research in the field of in vitro gametogenesis, and the challenge for the precursor stem cells to develop into fully matured egg or sperm cells.