Going to copy my comment from the original post: This is a bad title. The proper title should be the exact words of the scientists: "in this population of sper

Going to copy my comment from the original post: This is a bad title. The proper title should be the exact words of the scientists: "in this population of sperm donor applicants, in these four Danish cities, sperm concentrations have not changed between 2017 and 2022." Also, the paper finds that motile "healthy" sperm ACTUALLY WENT DOWN. "However, both the concentration and total numbers of motile (swimming) sperm provided for testing had declined by 16% and 22% respectively from 2019 to 2022." Either way, this paper is just one against the hundreds of papers and studies of sperm count, from different areas, times, populations, and many show reduced numbers while many do not. Of course I hope that there's nothing to worry about, but I think the default assumption should be take it very seriously (particularly when microplastics can even be found in men's testicles now). ----- Here's a link to the original paper https://academic.oup.com/humrep/advance-article/doi/10.1093/ https://academic.oup.com/humrep/advance-article/doi/10.1093/...