Test-Tube Zoo Babies

A National Zoo researcher works to perfect gamete preservation and in vitro fertilization techniques in order to better manage endangered populations.

Written byJef Akst
| 4 min read

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TEST-TUBE BAMBI: The world’s first surviving Eld’s deer fawn born from in vitro fertilization, with its surrogate mother at Khao Kheow Open Zoo, Thailand KHAO KHEOW OPEN ZOO, THAILAND

On October 17, 2011, a fawn was born at the Khao Kheow Open Zoo in Thailand. It wasn’t just any fawn; it was an Eld’s deer, considered endangered by the International Union for Conservation of Nature. Fewer than 1,500 of the graceful, brown animals remain in the wild, their historic numbers reduced by habitat loss and hunting. But the fawn born last fall wasn’t just any Eld’s deer; it was created by researchers who collected eggs, inseminated them in vitro after thawing frozen semen, and transferred the embryos to a surrogate mother.

“I was really excited,” says Pierre Comizzoli, a reproductive physiologist at the Smithsonian Conservation Biology Institute, who oversaw the Eld’s deer project. “[It was] the first test-tube fawn [to survive]. Last year [2010] ...

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  • Jef (an unusual nickname for Jennifer) got her master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses. After four years of diving off the Gulf Coast of Tampa and performing behavioral experiments at the Tennessee Aquarium in Chattanooga, she left research to pursue a career in science writing. As The Scientist's managing editor, Jef edited features and oversaw the production of the TS Digest and quarterly print magazine. In 2022, her feature on uterus transplantation earned first place in the trade category of the Awards for Excellence in Health Care Journalism. She is a member of the National Association of Science Writers.

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