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Why do women have periods?

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TEDEd Animation

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A handful of species on Earth share a seemingly mysterious trait: a menstrual cycle. We’re one of the select few mammals on Earth that menstruate, and we also do it more than any other animal, even though it’s a waste of nutrients, and can be a physical inconvenience. So where’s the sense in this uncommon biological process? TED-Ed describes the history and evolution of menstruation.

As the fetus in the human mother grows, its intense need for nutrients can cause:

About TED-Ed Animations

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

  • Director Biljana Labović
  • Animation Artist Josephine Mark
  • Script Editor Emma Bryce
  • Narrator Susan Zimmerman

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