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Harley, Kim G.; Marks, Amy R.; Chevrier, Jonathan; Bradman, Asa; Sjödin, Andreas; Eskenazi, Brenda
Environmental health perspectives, 05/2010, Volume: 118, Issue: 5Journal Article
Background: Exposure to polybrominated diphenyl ether (PBDE) flame retardants is widespread, with 97% of Americans having detectable levels. Although PBDEs have been associated with reproductive and hormonal effects in animals, no human studies have examined their association with fertility. Objectives: This study was designed to determine whether maternal concentrations of PBDEs in serum collected during pregnancy are associated with time to pregnancy and menstrual cycle characteristics. Methods: Pregnant women (n = 223) living in a low-income, predominantly Mexican-immigrant community in California were interviewed to determine how many months they took to become pregnant. Blood samples were collected and analyzed for PBDEs. PBDE concentrations were lipid adjusted and log₁₀ transformed. Analyses were limited to PBDE congeners detected in > 75% of the population (BDEs 47, 99, 100, 153). Cox proportional hazards models modified for discrete time were used to obtain fecundability odds ratios (fORs) for the association of PBDEs and time to pregnancy. Results: We detected all four congeners in > 97% of women. Increasing levels of BDEs 47, 99, 100, 153 and the sum of these four congeners were all associated with longer time to pregnancy. We observed significantly reduced fORs for BDE-100 adjusted fOR = 0.6; 95% confidence interval (CI), 0.4–0.9, BDE-153 (adjusted fOR = 0.5; 95% CI, 0.3–0.8), and the sum of the four congeners (adjusted fOR = 0.7; 95% CI, 0.5–1.0). PBDEs were not associated with menstrual cycle characteristics. Conclusions: We found significant decreases in fecundability associated with PBDE exposure in women. Future studies are needed to replicate and confirm this finding.
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