There are no known living males and neither of the two remaining northern white rhinos can carry a calf to term.
Northern white rhinos, which are actually grey, used to roam freely in several countries in east and central Africa, but their numbers fell sharply due to widespread poaching for their horns.
A Biorescue team led by researchers from the Leibniz Institute for Zoo and Wildlife Research in Germany has been racing against time to save the world's most endangered mammal. "The team has reached the decision to retire the older of the two remaining females, 32-year-old Najin, as a donor of egg cells," Biorescue said in a statement, citing ethical considerations.Scientists hope to implant embryos made from the rhinos' egg cells and frozen sperm from deceased males into surrogate mothers.
"We have been very successful with Fatu… So far we have 12 pure northern white rhino embryos," David Ndeereh, the acting deputy director for research at the Wildlife Research and Training Institute, a Kenyan state agency, told Reuters.The team hopes to be able to deliver its first northern white rhino calf in three years and a wider population in the next two decades. – Rappler.com
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