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Traffic pollutants affect fertility in men.

Michele De Rosa1, Stefano Zarrilli, Luigi Paesano

  • 1Department of Molecular and Clinical Endocrinology and Oncology, Department of Preventive Medical Sciences and Department of Internal Medicine, University of Naples 'Federico II', Italy. miderosa@unina.it

Human Reproduction (Oxford, England)
|May 2, 2003
PubMed
Summary

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Occupational exposure to traffic pollutants, specifically nitrogen oxide and lead, significantly impairs male semen quality, affecting sperm motility and count. This study highlights the adverse reproductive health impacts of traffic-derived environmental toxins.

Area of Science:

  • Environmental Health
  • Reproductive Toxicology
  • Occupational Medicine

Background:

  • The impact of traffic pollutants on male fertility remains debated.
  • Evaluating semen quality in men occupationally exposed to traffic is crucial.

Purpose of the Study:

  • To assess the effect of occupational exposure to traffic-derived pollutants on semen quality in male workers.
  • To investigate the correlation between specific pollutants and semen parameters.

Main Methods:

  • Semen quality and sex hormone levels were analyzed in 85 tollgate workers and 85 controls.
  • Assays included methaemoglobin, sulphaemoglobin, carboxyhaemoglobin, lead (Pb), and zinc (Zn) protoporphyrin.
  • Environmental measurements of carbonium oxide, nitrogen oxide, sulphur oxide, and Pb were conducted.

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Main Results:

  • While sperm count and hormone levels were normal, tollgate workers showed significantly lower sperm motility and progression.
  • Methaemoglobin levels correlated inversely with sperm motility and viability.
  • Blood lead (Pb) levels showed an inverse correlation with sperm viability and count.

Conclusions:

  • Traffic-derived nitrogen oxide and lead (Pb) adversely affect semen quality in occupationally exposed men.
  • Elevated methaemoglobin and blood Pb levels are linked to reduced sperm parameters.
  • Findings indicate a significant negative impact of traffic pollution on male reproductive health.