A rhinoceros is pregnant from embryo transfer in a success that may help nearly extinct subspecies

A rhinoceros is pregnant through embryo transfer in the first successful use of a method that conservationists said could be used to try to save the nearly extinct northern white rhino subspecies. The researchers created a southern white rhino embryo in a lab from an egg and sperm that had been previously collected from other rhinos and transferred it into a southern white rhino surrogate mother. Conservations said Wednesday the surrogate is now 70 days pregnant with a well-developed male embryo. They said the success with a southern white rhino pregnancy proves a concept that could be used in northern white rhinos. There are only two of them left in the world, both females that can't reproduce naturally.