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Maternal occupational exposure to ionizing radiation and birth defects
Awi Wiesel1, Claudia Spix, Andreas Mergenthaler
1Birth Registry Mainz Model, Children's Hospital, University Medical Center of the Johannes Gutenberg University, Langenbeckstr.1, 55131, Mainz, Germany. wiezel@kinder.klinik.uni-mainz.de
Radiation and Environmental Biophysics
|March 4, 2011
Summary
Occupational exposure to ionizing radiation during pregnancy may increase the risk of birth defects (BDs). This study found a higher prevalence of BDs in infants born to mothers with occupational radiation exposure.
Area of Science:
- Reproductive Health
- Occupational Health
- Medical Physics
Background:
- Limited research exists on occupational ionizing radiation exposure during pregnancy and its link to birth defects (BDs).
- Previous studies on high-dose exposure have not confirmed associations for employees or specific job titles.
Purpose of the Study:
- To explore the prevalence of birth defects (BDs) in infants born between January 2007 and February 2008.
- To investigate the association between maternal occupational exposure to ionizing radiation in the first trimester and the occurrence of BDs in offspring.
Main Methods:
- A prospective, population-based birth cohort study was conducted in two defined areas.
- Infants underwent active examination by trained pediatricians.
- Maternal questionnaires collected data on occupational and medical exposure to ionizing radiation during the first trimester of pregnancy.
Main Results:
- Data from 3,816 births were analyzed, with 165 infants (4.3%) having BDs.
- Mothers with occupational exposure to ionizing radiation (n=29) showed a higher prevalence of infants with BDs (13.8%) compared to unexposed mothers (4.3%).
- This corresponded to an exploratively calculated relative risk (RR) of 3.2 (1.2-8.7), increasing to 4.0 (1.5-10.7) when excluding deformations. Confounder adjustment did not significantly alter results.
Conclusions:
- The study suggests a potential increased risk of birth defects associated with occupational ionizing radiation exposure during early pregnancy.
- Further research is warranted to confirm these findings and establish clear occupational safety guidelines for pregnant workers.
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