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A comment on Testosterone levels show steady decrease among young US men. Parent comment

Re:Testosterone levels show steady decrease among young US men by bencollier49 on Thursday January 14, 2021 @02:52PM (#25781528)
I don't know why this was voted down. We've been performing in vitro fertilisation en masse since the 1980s. All of a sudden, men with non-motile sperm are fathering children.

So as a single cause it's not that massive, but at 1% of all births, the effects will soon stack up.

[ Parent | on HN ]
Re:Testosterone levels show steady decrease among young US men by worker767424 on Thursday January 14, 2021 @05:39PM (#25783854)
Also that reducing infant mortality rate and other early death rates means the weak ones live long enough to breed. Unlike IVF, this just stalls genetics. IVF actively selects for fertility issues.
[ Parent | on HN ]