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Why did hospitals have these frogs in their supply rooms? - Carly Anne York

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TEDEd Animation

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In the early 20th century, pregnancy testing required a slippery piece of equipment: a female African clawed frog. For decades, hospitals and research labs had a trusted supply of these handy creatures, employing their help in testing for pregnancy and in numerous other scientific endeavors. So what makes these frogs so special? Carly Anne York shares the secrets of these remarkable amphibians.

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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Carly Anne York
  • Director Yajun Shi
  • Narrator Alexandra Panzer
  • Storyboard Artist Yajun Shi
  • Animator Yajun Shi, Dongyao Chai
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Lesson in progress

The African Clawed Frog is now an invasive species all around the world. What invasive species are found where you live? How did they get there? What kinds of issues are they causing in your ecosystem?


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