News Exposure to Sunlight During Pregnancy Has No Influence on MS Risk in Children, Polish Study Finds Exposure to Sunlight During Pregnancy Has No Influence on MS Risk in Children, Polish Study Finds by Joana Fernandes, PhD | May 10, 2017 Share this article: Share article via email Copy article link The risk of childrenĀ developingĀ multiple sclerosis (MS) later in life has no link to how much sunlight their mothers were exposed to during pregnancy, a Polish study found. The study, āMonth of birth and level of insolation as risk factors for multiple sclerosis in Poland,ā appeared in the journal PLoS One. Previous studies have suggested that babies born in the spring have a higher risk of developing MS. This may be because their mothers, while pregnant, were exposed to less sunlight, which would lead to lower vitamin D3 production in the fetus. āHigher exposure to UVB radiation and resulting higher serum vitamin D concentration in the first trimester of pregnancy is possibly associated with lower risk of MS.Ā A number of international studies suggests that in the northern hemisphere, risk of developing MS is higher for those born in the spring and lower for those born in autumn,ā researchers wrote. āHowever, in central Eastern Europe, such studies are lacking. This region is of great interest for comparative analysis, because of the great seasonal fluctuation of UV light.ā To test this hypothesis, researchers analyzed data from 2,574 MS patients living permanently in Poland. The analysis included the average number hours of sunshine in all 12 months and looked specifically at MS cases inĀ Zabrze and RzeszĆ³w (southern Poland), and Bydgoszcz, Szczecin and BiaÅystok (northern Poland). These cities range in latitude from 50.04Ā° to 53.43Ā° N. The team found that from September to December, the incidence of MS is indeed lower than during spring time. However, researchers found no correlation between hours of sunshine in the first trimester of pregnancy, the childās birth month and MS development. This study has certain limitations, including the fact that researchers did not know the individual exposure of the pregnant mother to UVB radiation, or how much vitamin D mothers consumed in their diet.Ā Nonetheless, the team concluded: āWe were able to confirm a seasonal variation in MS risk in Poland; however, these findings were not easily correlated with insolation during the first trimester of pregnancy.ā Print This Page About the Author Joana Fernandes, PhD Joana brings more than 8 years of academic research and experience as well as Scientific writing and editing to her role as a Science and Research writer. She also served as a Postdoctoral Researcher at the Center for Neuroscience and Cell Biology in Coimbra, Portugal, where she also received her PhD in Health Science and Technologies, with a specialty in Molecular and Cellular Biology. Tags pregnancy, risk, sunlight, vitamin D
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