VDR Variants rather than Early Pregnancy Vitamin D Concentrations Are Associated with the Risk of Gestational Diabetes: The Ma’anshan Birth Cohort (MABC) Study

Aim . This study investigated the associations among early pregnancy vitamin D concentrations, seasonality, and vitamin D metabolic gene variants and how these variables related alone and in interaction with the risk of gestational diabetes mellitus (GDM). Methods . Research participants were women from the Ma’anshan birth cohort study in China. The overall study included 3110 women to explore the association between early pregnancy vitamin D...