concentration of maternal serum 25-hydroxy vitamin d and gestational 2 diabetes mellitus risk

Background: the present study was designed to primarily investigate the association between serum 25 (oh) vitamin d levels and gestational diabetes mellitus (gdm) in a sample of iranian woman. methods: in the present cross-sectional study 136 pregnant women (68 with gdm and 68 non gdm) who were referred to a university hospital clinic of the tabriz university of medical sciences during july to september 2016 were studied. all pregnant women were assessed for gdm and also serum vitamin d was assessed in all participants. results: the mean serum 25(oh) d of pregnant women was 13.42±7.78 ng/ml. in the term of the mean serum 25(oh) d level, there was not significant differences between gdm (14.45±8.73) and nongdm (12.38±6.62) pregnant women (p=0.12). totally 83.8% of participants were vitamin d deficient and 11.8% of them had insufficient amount of serum vitamin d. only 4.4% of participants were vitamin d sufficient. the results of logistic regression analysis showed no significant association between gdm and vitamin d status in both unadjusted and adjusted (for mother`s age, parity, bmi and gestational week) models. conclusion: the results of the present study could not show any association between serum vitamin d and gdm. it seems that other factors rather than serum level of 25 (oh) vitamin d level likely explain the growing prevalence of gdm.