Tensing, an 11-year-old greater one-horned rhino, is 10 months pregnant and is expected to give birth in March 2020, announced U.S.' Denver Zoo on September 22, 2019, which is also World Rhino Day. /VCG Photo

Tensing became pregnant after artificial insemination, using sperm from Jontu, a 10-year-old greater one-horned rhino from Omaha's Henry Doorly Zoo and Aquarium. /VCG Photo

Over the past several years, doctors have conducted 11 attempts to get Tensing pregnant, but none were successful. They didn't give up and tried again in November, 2018. Twenty-three days later, they received good news. /VCG Photo

Doctors tested her every week and determined that Tensing and the fetus are both healthy. The fetus is now the size of a large watermelon, said the zoo. /VCG Photo

Tensing is also a great Indian rhinoceros, which is native to the Indian continent. She weighs about 4,000 pounds. /VCG Photo