Image Gallery: Yawning in the Womb

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24-week old fetus yawning

Credit: Nadja Reissland
Though the exact purpose of yawning is a mystery, 4-D ultrasound images reveal that fetuses yawn in utero
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Author Bio
Tia Ghose, LiveScience Staff Writer

Tia Ghose

Tia has interned at Science News,, and the Milwaukee Journal Sentinel and has written for the Center for Investigative Reporting, Scientific American, and ScienceNow. She has a master's degree in bioengineering from the University of Washington and a graduate certificate in science writing from the University of California Santa Cruz.
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