Some links about the alleged human male fertility crisis—it’s been suggested that this may lead to population decline, but a 2021 study has pointed out flaws in the research claiming a decline in sperm count:
I didn’t find this response very convincing. Apart from attempting to smear the researchers as racist, it seems their key argument is that while sperm counts appear to have fallen from towards the top to the bottom of the ‘normal’ range, they’re still within the range. But this ‘normal’ range is fairly arbitrary, and if the decline continues presumably we will go below the normal range in the future.
I don’t know if this subject is still of interest to you, but Scott wrote a detailed review of the subject here; he concluded with essentially a 50% probability that we are seeing significant declines.
There is also a Manifold market on the subject here.
Some links about the alleged human male fertility crisis—it’s been suggested that this may lead to population decline, but a 2021 study has pointed out flaws in the research claiming a decline in sperm count:
Male fertility is declining – studies show that environmental toxins could be a reason (The Conversation, 2021)
The Sperm-Count ‘Crisis’ Doesn’t Add Up (New York Times, 2021)
Study aims to quell fears over falling human sperm count (Harvard Gazette, 2021)
I didn’t find this response very convincing. Apart from attempting to smear the researchers as racist, it seems their key argument is that while sperm counts appear to have fallen from towards the top to the bottom of the ‘normal’ range, they’re still within the range. But this ‘normal’ range is fairly arbitrary, and if the decline continues presumably we will go below the normal range in the future.
I don’t know if this subject is still of interest to you, but Scott wrote a detailed review of the subject here; he concluded with essentially a 50% probability that we are seeing significant declines.
There is also a Manifold market on the subject here.