This May 15, 2018 photo provided by San Diego Zoo Global shows a researcher pointing to the newest ultrasound of Victoria, a southern white female rhino at the San Diego Zoo Safari Park in Escondi …

This May 15, 2018 photo provided by San Diego Zoo Global shows a researcher pointing to the newest ultrasound of Victoria, a southern white female rhino at the San Diego Zoo Safari Park in Escondido, Calif. (Tammy Spratt/San Diego Zoo Global via AP)