Scientists in Japan say they have succeeded in breeding mice with two fathers, using eggs originating from male cells. While the scientific breakthrough could pave the way for new fertility treatments, experts say it is still a long way from being used in humans.
Katsuhiko Hayashi, a renowned biologist at the University of Osaka, said his team had used chromosomal engineering to breed seven “healthy” mice pups, hailing a “first case of making robust mammal oocytes (eggs) from male cells”.
