Andrew Huberman· PhD
for every two degree increase in temperature of the scrotum, there's a 20% decrease in spermatogenesis and viability of sperm.
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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.
for every two degree increase in temperature of the scrotum, there's a 20% decrease in spermatogenesis and viability of sperm.
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Human spermatogenesis is a delicate process that occurs optimally within a very small temperature window (~89-93 F/ 32-34 C).