Reproductive health effects of PFAS exposure affect both sexes, and emerging research on male reproductive outcomes provides additional motivation for PFAS reduction through water filtration for households in family planning stages or concerned about fertility.
PFAS and Sperm Quality
Multiple studies examining sperm parameters in men with different PFAS blood concentrations have found associations between higher PFAS levels and reduced semen quality — including lower sperm concentration, reduced motility, and altered morphology. A systematic review and meta-analysis of available studies found consistent negative associations for PFOA and PFOS with sperm parameters. Given the role of sperm quality in fertility outcomes, these findings are clinically relevant for couples attempting conception.
Testosterone and Endocrine Disruption
PFAS has been found to affect testosterone levels in epidemiological studies, with some studies finding lower testosterone in men with higher PFAS exposure. Testosterone regulates multiple aspects of male reproductive function including sperm production and libido. The mechanism likely involves PFAS interference with steroidogenesis — the biochemical pathway for hormone production — in Leydig cells of the testes.
Practical Considerations for Men
For men in fertility treatment, facing unexplained infertility, or planning to conceive within the next year, reducing PFAS exposure through certified water filtration is a low-burden, no-downside intervention that may support sperm quality alongside other fertility-supportive practices. Given the 70+ day sperm production cycle, reducing PFAS exposure 3 to 6 months before planned conception allows time for any improvements in sperm parameters to be reflected in the sperm cohort present at the time of conception attempts.