IRCT201403175623N18 IRCT 2014-03-25 Arak University of Medical Sciences Effect of selenium in treatment of gestational diabetes Effect of selenium supplementation on insulin resistance, oxidative stress and inflammatory factors in women with gestational diabetes 2014-03-18 anticipated 70 Complete https://irct.ir/trial/6048 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: At study baseline and after balanced block randomization, subjects will be randomly divided into two groups to take either selenium supplementation (n = 35) or placebo (n = 35). Randomization will be done by the use of computer-generated random numbers, Blinding description: Randomization and allocation will be concealed from the researchers and participants until the final analyses are completed. Another person at the maternity clinics affiliated with the Arak University of Medical Sciences, Arak, Iran, who is not involved in the trial and not aware of random sequences, will be assigned the participants to the numbered bottles of capsules. 2 Gestational diabetes mellitus. Intervention 1: Intervention group: Selenium capsule, 200 µg, daily for 6 weeks orally. Intervention 2: Control group: Placebo capsule, daily for 6 weeks orally. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Undecided - It is not yet known if there will be a plan to make this available