Inside the National Zoo's Hormone Lab (Giant Panda Pregnancy Watch)

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Inside the National Zoo's Hormone Lab (Giant Panda Pregnancy Watch)

When animal care staff at the Smithsonian's National Zoo need to know when to breed their pandas or when to expect a cub they turn to the Endocrine (Hormones) Research Lab at the Zoo's Front Royal, Va. facility. This lab--one of the largest in the world--is dedicated to enhancing the reproduction and well-being of animals living in zoos and in the wild. Lab technician Sarah Putman explains one of the most frequent questions asked about the pandas: Why is there no panda pregnancy test?

4 min 18 sec

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