Humanity is facing not only a coronavirus pandemic and a climate crisis , but its existence is also threatened by falling sperm counts because of chemical exposures, a prominent epidemiologist warns in a new book. In the book, Swan argues that chemicals pervasive in our world are interfering with the hormones in our bodies and contributing to harmful reproductive health outcomes in men and women. Forever chemicals: Toxic 'forever chemicals' found in drinking water throughout US. The chemicals enter our bodies through foods and drink, microscopic airborne particles we inhale, and in the products we absorb through our skin, Swan said. They're found in plastic and vinyl, floor and wall coverings, medical tubing and medical devices, children's toys, nail polishes, perfumes, hair sprays, soaps, shampoos and more. The processed food we eat passes through soft tubing to get into its packaging.
Study aims to quell fears over falling human sperm count
Why Sperm Counts Are Dropping For Men Today | GQ
They also said the rate of decline is not slowing. Both findings -- in a meta-analysis bringing together various studies -- pointed to a potential decline in male health and fertility. The analysis did not explore reasons for the decline, but researchers said falling sperm counts have previously been linked to various factors such as exposure to certain chemicals and pesticides, smoking, stress and obesity. This suggests measures of sperm quality may reflect the impact of modern living on male health and act as a "canary in the coal mine" signaling broader health risks, they said. Studies have reported declines in sperm count since the early s, but many of those have been questioned because they did not account for potentially major confounding factors such as age, sexual activity and the types of men involved. Working with a team of researchers in the United States, Brazil, Denmark, Israel and Spain, Levine screened and brought together the findings of sperm count studies from to and then conducted a so-called meta-regression analysis.
Sperm Count Zero
Men are doomed. Everybody knows this. We're obviously all doomed, the women too, everybody in general, just a waiting game until one or another of the stupid things our stupid species is up to finally gets us. But as it turns out, no surprise: men first. Second instance of no surprise: We're going to take the women down with us.
Recent studies have claimed that sperm counts among men globally, and especially from "Western" countries, are in decline, leading to apocalyptic claims about the possible extinction of the human species. Richardson, and colleagues, reanalyzes claims of precipitous human sperm declines, re-evaluating evidence presented in the widely-cited meta-analysis by Hagai Levine, Shanna Swan, and colleagues. Richardson: "The extraordinary biological claims of the meta-analysis of sperm count trends and the public attention it continues to garner raised questions for the GenderSci Lab, which specializes in analyzing bias and hype in the sciences of sex, gender, and reproduction and in the intersectional study of race, gender, and science.