Environmental Factors as the Main Hormonal Disruptors of Male Fertility

Abstract

Overview

Recent decades have seen a global decline in semen parameters among males, raising significant public health concerns. Scientific reports link this decline to hazardous environmental factors including water, air, and soil pollution, as well as exposure to electromagnetic fields (EMF) and ionizing radiation. This review systematically evaluates the effects of selected environmental disruptors on male reproductive capacity using data retrieved from PubMed, EMBASE, and Scopus between 2015 and December 2023.

Findings

• Environmental pollutants such as heavy metals, tobacco smoke, pesticides, dioxins, furans, phthalates, and bisphenols adversely impact male fertility, primarily through induction of oxidative stress and interference with the endocrine system.
• Electromagnetic fields, including those from natural and artificial sources (e.g., welding, radar stations, GSM/mobile phones), can:
  • Generate oxidative stress disrupting mitochondrial and cell membrane integrity in sperm, subsequently affecting fertilization potential and sperm motility.
  • Alter function of ion channels vital for sperm capacitation, particularly the voltage-gated Hv1 channel sensitive to EMF effects.
  • Cause adverse reproductive outcomes such as reduced sperm quality and motility, increased sperm DNA fragmentation, potential disruptions of the hypothalamic-pituitary-gonadal axis, and higher rates of congenital defects in offspring.
  • Long-term occupational EMF exposure (e.g., welders, radar operators, high-voltage workers) is associated with decreased fertility and reproductive anomalies.
• Some reports suggest that extremely low-frequency EMF may transiently benefit sperm motility in humans and animals or improve prostate function, but these findings warrant cautious interpretation due to possible long-term epigenetic effects.

Conclusion

Current scientific evidence supports a connection between environmental factors, especially EMF exposure, and adverse male reproductive health outcomes. While thresholds for harmful versus potentially neutral or beneficial EMF exposure remain unclear, caution and further research are urged—particularly regarding possible epigenetic impacts in future generations. Improvement in environmental quality is crucial given the significant risks posed by these disruptors to both fertility and general human health.