https://www.theguardian.com/science/2017/jul/29/infertility-crisis-sperm-counts-halved
https://www.tandfonline.com/doi/abs/10.1080/14647273.2021.1917778
https://www.centreformalepsychology.com/male-psychology-magazine-listings/is-sperm-quality-deteriorating-worldwide-find-out-what-the-experts-are-saying
https://www.nytimes.com/2017/08/16/health/male-sperm-count-problem.html