The mystery is this. Since the late 1930s, sperm counts around the world appear to have dropped significantly. While the decline was initially observed in western countries, there is evidence of the same phenomenon in the developing world, and it seems to be accelerating. Swan, a Berkeley-trained statistician-turned-epidemiologist, believes she knows why.
For more than two decades she has devoted her life to studying the effects of “endocrine disrupting” chemicals (EDCs), which can interfere with the body’s natural hormones. These include pesticides, bisphenols, which harden plastic so it can be used in food storage containers and baby bottles, and phthalates, which soften plastic for use in packaging and products such as garden hoses. In recent years, traces of EDCs have been found in breast milk, placental tissue, urine, blood and seminal fluid.
In the glare of orange spotlights, Swan led the Copenhagen audience to her conclusion: that the innocuous products in your kitchen cupboard, bathroom cabinet or garden shed may be lowering sperm counts. They could also affect the reproductive systems of your unborn children. The implications of EDCs for human health don’t stop there: they can disrupt thyroid function, trigger cancer and obesity.
Toxic chemicals found in plastics and pesticides may harm human fertility, according to scientist Shanna Swan.
She tells us why https://t.co/4FJng2nwQr
— Financial Times (@FinancialTimes) June 22, 2023