Environmental and occupational exposure to toxicants and sperm parameters of men investigated for infertility
Sri Lanka Journal of Obstetrics and Gynaecology
Objective: The study aimed to determine the association between environmental and occupational exposure to toxicants and semen parameters of men investigated for infertility. Methods: Exposure information was obtained using interviewer administered questionnaire with informed consent. WHO guidelines and cut off values were used in analyzing the sperm parameters. The parametric and non-parametric data were analysed using t-test and chisquare test respectively. Mean semen parameters between
... eters between groups exposed to different toxicants were compared using one way ANOVA. Results: In the study population, 53.9% of men were exposed to toxicants through environmental or occupational sources. Exposures were mainly to petroleum products (30.2%), industrial chemicals (16.9%) and agrochemicals (6.8%).The mean values of sperm concentration, progressive motility, normal forms and viability of subjects exposed to petroleum products were lower compared to non exposed group with significant differences in normal morphological forms [31.1 (18.46)%] vs. [38.1 (17.90)%] (p=0.02) and viability [46.6 (22.26)%] vs. [55.2 (19.50)%] (p=0.02). All the sperm parameters were lower in the exposed group, with a significant difference in sperm morphology [33.5 (17.1)%] vs. [38.1(17.9)%] (p=0.03) and sperm viability [49.3 (19.4)%] vs. [55.2 (19.5)%] (p=0.02) compared to non exposed group. Conclusion: Occupational and environmental exposure to reproductive toxicants is associated with poor semen quality with significant reduction in normal forms and viability of sperm.