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Scientists had been saving sperm from the last four white rhino bulls. Now, for the first time, they found a way to create hybrid embryos by applying the test-tube fertilization (IVF) technique. They combined oocytes extracted from a female southern white rhino, a similar sub-species, with the thawed sperm. The hybrid embryos are ready enough to breed but a surrogate southern white rhino female still hasn’t been identified.
Read more in “Rhino Embryos Created in Lab, Offering Hope for Nearly Extinct Species”
White Rhinos Are Nearly Extinct – But This Test-Tube Embryo May Help Save Them | National Geographic