Yawning, a contagious reflex that may begin before birth

Research suggests that yawning, the first documented contagious reflex, may begin in utero during pregnancy.

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The fact

This natural phenomenon manifests well before birth and persists throughout human life.

The neurobiological mechanisms of this behavioral contagion remain partially unexplained by science.

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Auto-synthesis from 1 media source · identified on May 11, 2026