Live birth after ovarian tissue transplant

Fresh pieces of monkey ovary remain fully functional even when moved to a new site. Radiation and high-dose chemotherapy may render women with cancer prematurely sterile, a side-effect that would be avoided if ovarian tissue that had been removed before treatment could be made to function afterwards. Live offspring have been produced from transplanted ovarian tissue in mice1 and sheep2 but not in monkeys3 or humans4,5, although sex steroid...