Lower vitamin D levels at first trimester are associated with higher risk of developing gestational diabetes mellitus.
This study tested the associations between vitamin D levels and the risk of developing diabetes and insulin resistance (the diminished ability of the body to respond to the action of insulin in decreasing blood sugars) during pregnancy. Blood samples were taken from 655 participants in the first (6-13 weeks) and second (24-28 weeks) trimester. The results suggested that low levels of vitamin D during the first trimester are a risk factor for pregnant women to develop diabetes and contribute to increased insulin resistance in the second trimester. Further details can be found in the study.
Lacroix M, Battista MC, Doyon M, Houde G, Ménard J, Ardilouze JL, Hivert MF, Perron P. Lower vitamin D levels at first trimester are associated with higher risk of developing gestational diabetes mellitus. Acta Diabetol. 2014 Aug;51(4):609-16.