How Our Modern World Is Altering Male and Female Reproductive Development, Threatening Sperm Counts, and Imperiling the Future of the Human Race
By Shanna H. Swan with Stacey Colino
If you’ve smugly enjoyed the dystopian worlds of “The Handmaid’s Tale” (where infertility is triggered in part by environmental pollutants) or “Children of Men” (where humanity is on the precipice of extinction) — and believed that these stories were rooted firmly in fantasy — Shanna Swan’s “Count Down” will serve as an awakening.
“Count Down,” which Swan wrote with the health and science journalist Stacey Colino, chronicles rising human infertility and warns of dire consequences for our species if this trend doesn’t slow. The reason, Swan explains, may be growing exposure to “endocrine disrupting chemicals” that are found in everything from plastics, flame retardants, electronics, food packaging and pesticides to personal care products and cosmetics.
She outlines the danger. These substances interfere with normal hormonal function, including testosterone and estrogen. Even in small doses, they pose particular danger to unborn babies and young children whose bodies are growing rapidly. These hormone-warping chemicals, which can enter even the placenta, have the ability to alter the anatomical development of girls and boys, change brain function and impair the immune system.
Swan is a noted environmental and reproductive epidemiologist who has studied this subject for more than two decades. Her work on falling sperm counts garnered worldwide attention in 2017. Media coverage focused on her central finding: From 1973 to 2011, the total sperm count of men in Western countries dropped by 59 percent. The quality also nose-dived, with more odd-shaped sperm and fewer strong swimmers capable of fertilizing an egg. Perhaps most important, the DNA they carried was also more damaged.”