This May 15, 2018 photo provided by the San Diego Zoo Global shows Barbara Durrant, right, director of reproductive Sciences at the San Diego Zoo Institute for Conservation Research and Parker Pennington, Ph.D., dost-doctoral associate, San Diego Zoo Institute for Conservation Research, preform an ultrasound of a southern white rhino, Victoria, left, at the San Diego Zoo Safari Park in Escondido, Calif. The rhino has become pregnant through artificial insemination at the zoo giving hope for efforts to save a subspecies of one of the world's most recognizable animals, researchers announce.  (Tammy Spratt/San Diego Zoo Global via AP)
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