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In the past, male infertility was observed in workers exposed to DBCP and chlordecone, two pesticides that are no longer used. Decreased libido has been associated with exposures to lead, manganese, and beta-chloroprene. Decreased sperm count (oligospermia) has been associated with glycol ethers, carbon disulfide, lead, and acute ionizing radiation. [ATSDR Case Studies # 29: Reproductive and Developmental Hazards] Proven toxins of male fertility are DBCP, lead (>40 ug/100ml), carbon disulfide (TTCA > 4 mg/g creatinine), 2-bromppropane, and manganese (>20 ug/l in blood). Proven exposure scenarios are welding, professional driving, and working with heat. [Hyperlink] |