There is argument that the way sperm count data is collected is not accurate[1]. In short, historical data has good reasons to assume it is not reliable, and t

There is argument that the way sperm count data is collected is not accurate[1]. In short, historical data has good reasons to assume it is not reliable, and there are inexplicable geographic divergences which seem correlated now strongly with the number of studies then any other factor: i.e we simply aren't using large enough or comparable sample sizes, and what looks like decline is regression towards the true mean. Of note: the decline still does not show an average below the levels required to be regarded as fertile, and it also does not show a reduction in observably fertile men (those who have fathered children). [1] https://news.harvard.edu/gazette/story/2021/05/fears-over-falling-human-sperm-count-may-be-overblown/ https://news.harvard.edu/gazette/story/2021/05/fears-over-fa...