A Reproductive Toxicology study of 190 men recruited at an infertility clinic found BPA in 89 percent of them, with exposure linked to declines in sperm concentration, motility and shape. Another study found the chemical is high in cash register receipts, not just food packaging.
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Can't get your wife pregnant? Eat tons of fatty fish!
Mice lacking the gene for an enzyme needed to make DHA, an omega-3 fat, produced very little high-quality sperm; what they made was round rather than elongated and could not move. Feeding those mice a DHA-fortified diet restored their fertility.
Environment
Reduced fertility linked to flame retardant exposure
Among 223 Mexican women, each tenfold rise in blood levels of four polybrominated diphenyl ethers came with a 30 percent drop in the monthly chance of conceiving. Lead author Kim Harley calls it the first study to tie these flame retardants to reduced fertility in women.
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