Najin, one of the world’s last northern white rhinos, retires from breeding

Najin, a 32-year-old northern white rhino — who, along with her daughter Fatu is one of only “Weighing this outcome with potential risks, it is the most responsible decision to cease any further intervention on Najin and to stop using her as a donor of oocytes,” they said in the press release.”She will remain a part of the program, for example by providing tissue samples for stem cell approaches, which can be performed with minimal invasion.The researchers added that they had found multiple small, benign tumors on her reproductive organs.The retirement of Najin from oocyte collections leaves just one living northern white rhino left in the breeding program — her daughter, Fatu, who is more than a decade her junior.