Is the Concentration of Cadmium, Lead, Mercury, and Selenium Related to Preterm Birth?
Environmental pollution and exposure of people to heavy metals cause many bad obstetric outcomes. Our aim is to demonstrate the role of cadmium (Cd), lead (Pb), mercury (Hg), and selenium (Se) in preterm labor etiology with a case-control study. In this study, between November 2017 and April 2018, preterm delivery mothers and term delivery mothers were compared in Çorum, Turkey. All deliveries were performed with cesarean sections and there were 30 mothers in the control group and 20 in the study group. The maternal blood, maternal urine, umbilical cord blood, and heavy metal levels in the amnion fluid in both groups were studied. Graphite furnace atomic absorption spectrometry was used to determine the blood concentration of Cd, Pb, Hg, and Se. We found lower levels of selenium in blood and urine of preterm delivery mothers and umbilical cord and amnion fluids of preterm infants (p < 0.01). We found a statistically significant positive correlation at selenium levels between mother’s blood and umbilical cord blood (r (50) = 0.896, p < 0.001) and between maternal urine and amniotic fluid (r (50) = 0.841, p < 0.001). We have not found a similar correlation between mother and fetus of other metals (p > 0.05). We found that selenium levels were lower in mothers who were preterm birth in the light of the data in our study. We could not determine the positive or negative correlation of Cd, Pb, and Hg levels in blood, urine, and amniotic fluid samples with preterm birth.
KeywordsHeavy metal Preterm birth Cadmium Mercury Lead Selenium
We would like to thank Çorum Municipality. Our work was supported by the program “I have a project for Çorum” initiated by the Hitit University and the Municipality of Çorum. We would also like to thank Hitit University Scientific Technique Application and Research Center for their help in analysis on samples.
Compliance with Ethical Standards
Before the start of the study, approval was obtained from the Ethics Committee of the Hitit University Medical Faculty in accordance with the Helsinki Declaration. Informed consent forms were obtained from the patients included in the study.
Conflict of Interest
The authors declare that they have no conflict of interest.
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