**Claim for Discussion**
In seasonally breeding animals, high levels of melatonin shrink ovaries and make animals infertile, and shrink male testes from grape-size to rice-grain size
Original quote: "Melatonin in males of seasonal breeders takes the testes and shrinks them... these little Siberian hamsters... have testes about the size of, sort of typical table grapes... When days get shorter and the melatonin signal gets longer... Those same hamsters would have testes that would involute to the..."
Source: Andrew Huberman at 47:41 on Andrew Huberman - How to Defeat Jet Lag, Shift Work & Sleeplessness
What do you think?
In seasonally breeding animals, high levels of melatonin shrink ovaries and make animals infertile, and shrink male testes from grape-size to rice-grain size
Original quote: "Melatonin in males of seasonal breeders takes the testes and shrinks them... these little Siberian hamsters... have testes about the size of, sort of typical table grapes... When days get shorter and the melatonin signal gets longer... Those same hamsters would have testes that would involute to the..."
Source: Andrew Huberman at 47:41 on Andrew Huberman - How to Defeat Jet Lag, Shift Work & Sleeplessness
What do you think?
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