3 ms·

Missing it. The modern pants aren’t that accommodating for the right blood flow and temperature, especially when sitting for prolonged time. Giving the establis

by trhway 3y ago

Missing it. The modern pants aren’t that accommodating for the right blood flow and temperature, especially when sitting for prolonged time. Giving the established effect of the temperature on the sperm quality and count, I'd venture a guess that it may be among the reasons for the global sperm count decline which seems to parallel with the office jobs (sitting) proliferation and the decrease of the blue collar (standing/walking) jobs.

shiroiuma 3y ago
Someone should do a research study to determine if wearing skirts is better for men with office jobs.
taway_6PplYu5 3y ago
Counterargument is that the global sperm count decline is global. As in not limited to humans. It is seen in many mammals.
- akovaski 3y ago
  Do you have a source for the claim that sperm count for many mammals has been declining? I was only able to find "Sperm counts in semen of farm animals 1932-1995" https://pubmed.ncbi.nlm.nih.gov/9401823/ https://pubmed.ncbi.nlm.nih.gov/9401823/ Which states that farm animal sperm count has unchanged or has increased over time.
- dmurray 3y ago
  Even the evidence for humans is a bit patchy - a third of studies come to the opposite conclusion, and plenty of those that agree have massive methodological flaws. So I doubt we can say that with any real confidence for other mammals. https://www.astralcodexten.com/p/declining-sperm-count-much-more-than https://www.astralcodexten.com/p/declining-sperm-count-much-...
  - trhway 3y ago
    Just want to highlight that you put a blog named "Astral Codex Ten" claiming patchiness and methodological flaws because "data are very noisy" against the peer-reviewed journals like Oxford Scientific which for example states: "This comprehensive meta-regression analysis reports a significant decline in sperm counts (as measured by SC and TSC) between 1973 and 2011, driven by a 50–60% decline among men unselected by fertility from North America, Europe, Australia and New Zealand. " If the "data are very noisy" argument were a sound argument it would have dismissed most of the science that we have today.
    - dmurray 3y ago
      I'm not putting anything against anything. That paper [0] completely agrees with the blog - they threw out all but 38 of the 2936 studies they considered, for crying out loud - and neither makes any call on sperm count in animals other than humans. [0] https://academic.oup.com/humupd/article/29/2/157/6824414 https://academic.oup.com/humupd/article/29/2/157/6824414

by trhway 3y ago

shiroiuma 3y ago

Someone should do a research study to determine if wearing skirts is better for men with office jobs.

taway_6PplYu5 3y ago

Counterargument is that the global sperm count decline is global. As in not limited to humans. It is seen in many mammals.

akovaski 3y ago
Do you have a source for the claim that sperm count for many mammals has been declining? I was only able to find "Sperm counts in semen of farm animals 1932-1995" https://pubmed.ncbi.nlm.nih.gov/9401823/ https://pubmed.ncbi.nlm.nih.gov/9401823/ Which states that farm animal sperm count has unchanged or has increased over time.
dmurray 3y ago
Even the evidence for humans is a bit patchy - a third of studies come to the opposite conclusion, and plenty of those that agree have massive methodological flaws. So I doubt we can say that with any real confidence for other mammals. https://www.astralcodexten.com/p/declining-sperm-count-much-more-than https://www.astralcodexten.com/p/declining-sperm-count-much-...
- trhway 3y ago
  Just want to highlight that you put a blog named "Astral Codex Ten" claiming patchiness and methodological flaws because "data are very noisy" against the peer-reviewed journals like Oxford Scientific which for example states: "This comprehensive meta-regression analysis reports a significant decline in sperm counts (as measured by SC and TSC) between 1973 and 2011, driven by a 50–60% decline among men unselected by fertility from North America, Europe, Australia and New Zealand. " If the "data are very noisy" argument were a sound argument it would have dismissed most of the science that we have today.
  - dmurray 3y ago
    I'm not putting anything against anything. That paper [0] completely agrees with the blog - they threw out all but 38 of the 2936 studies they considered, for crying out loud - and neither makes any call on sperm count in animals other than humans. [0] https://academic.oup.com/humupd/article/29/2/157/6824414 https://academic.oup.com/humupd/article/29/2/157/6824414