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Epidemiology of Drinking Water Fluoride and Its Contribution to Fertility, Infertility, and Abortion: An Ecological Study in West Azerbaijan Province, Poldasht County, Iran



Yousefi M1 ; Mohammadi AA2 ; Yaseri M3 ; Mahvi AH1, 4
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur, Iran
  3. 3. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran

Source: Fluoride Published:2017

Abstract

Research, including animal studies, shows that the fluoride ion (F) adversely impacts the reproductive system in mammals. However, the gene-environment interaction mechanisms involved in this association remain unclear. The objective of the present study was to measure the F level in two regions of Poldasht county, Iran, with low and high drinking water F levels (means 1.90 and 8.10 mg/L, respectively) and to examine, in females living in the areas, the relationship between the drinking water F and (i) fertility, (ii) infertility without known etiological factors, and (iii) abortion without known etiological factors. Comparing the women in the low and high F areas, the respective rates were: (i) fertility: 105/1993, 5.3%; 70/1224, 0.5%; (ii) infertility without known etiological factors: 17/1993, 0.9%; 24/1224, 2.0%; and (iii) abortion without known etiological factors: 6/105, 5.7%; 11/70, 10.0%. We found that there were no statistically significant differences in the reproductive parameters between the low and high F regions when the women were considered by 5-year age groups, but, when the data were pooled and all the age groups were considered together in a group with ages 10-49 yr, those in the low F group were more fertile (p<0.05) and had lower rates of (i) infertility without known etiological factors (p<0.001) and (ii) abortion without known etiological factors (p<0.001). © 2017, ISFR.
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