Ultrasound videos can capture fetuses yawning in the womb. While fetuses yawn frequently during mid-pregnancy, yawning tapers off as fetuses develop.
via LiveScience.com http://www.livescience.com/24991-fetuses-yawn-in-utero-video.html
via LiveScience.com http://www.livescience.com/24991-fetuses-yawn-in-utero-video.html
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