> "This “1 percent effect” includes the rates of declining sperm counts, decreasing testosterone levels and increasing rates of testicular cancer, as well as a rise in the prevalence of erectile dysfunction."

The article, and many with it, focuses on sperm count, testosterone levels and other things, but this does not necessarily mean that reproduction is going down. A much bigger cause is probably that couples decide they do not want to have kids or that couples form later today than before so the woman is close to 40 when they start to try.

Often it is also reported as if it is the end of the human race, but we forget that there are many solutions to this (in vitro, adoption, ...). And in absolute terms there are more babies born today than ever before.

I heard that it is either now or we have already passed “peak baby”. And that “peak human” will be hit roughly 50 years from now

Just because we are near peak baby (either now or just recently) doesn’t mean there isn’t a problem.

https://thenewdaily.com.au/life/2022/11/12/the-stats-guy-pea...

But definitely part of the issue of population drop is delaying having a family or decide not to have one.