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the claim

Nocturnal penile tumescence is a normal physiological response occurring during REM sleep stages

the verdict

SUPPORTED

the evidence backs this

confidence 75/100

Nocturnal penile tumescence is a well-documented physiological phenomenon that consistently occurs during rapid eye movement (REM) sleep in healthy males.

Evidence for · 3

Sleep-related erectile activity.

1996 · cited by 0

Paper 0 establishes that sleep-related erections occur in healthy men in close temporal association with REM sleep.

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More for · 2

REM sleep determined using in utero penile tumescence in the human fetus at term.

1991 · cited by 0

Paper 3 demonstrates that fetal penile tumescence is strongly associated with REM sleep periods.

Nocturnal penile tumescence in healthy aging men.

1988 · cited by 0

Paper 5 examines nocturnal penile tumescence in healthy aging men and confirms its occurrence during sleep stages.

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first checked01 Aug 2026

judged → SUPPORTED · 7501 Aug 2026

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