Andrew Huberman· PhD
heat is not good for sperm which is why the scrotum has its um the features that it does to move the the testicles further or um closer to the body
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
heat is not good for sperm which is why the scrotum has its um the features that it does to move the the testicles further or um closer to the body
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The testicles are located “outside” the body in the scrotum specifically to maintain a temperature 2-4 °C below core body temperature, essential for optimal sperm production and storage (in the epididymis) .
to keep scrotal temperature at 33.5 ± 0.2 °C ≥2 °C below core because every 1 °C rise can cut sperm count by ~14 % and motility by ~21 % according to Hum. Reprod. 2019.