IRCT201311205623N11 IRCT 2013-12-01 Kashan University of Medical Sciences Effect of calcium and vitamin D in treatment of gestational diabetes Effect of calcium and vitamin D co-supplementation on insulin resistance and inflammatory factors in women with gestational diabetes 2013-11-20 anticipated 56 Complete https://irct.ir/trial/6041 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: At study baseline, after balance randomization, subjects will be randomly divided into two groups to take either calcium and vitamin D co-supplementation (n = 28) or placebo (n = 28). 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 to Kashan University of Medical Sciences, 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: Vitamin D3 capsule, 50000 IU, every 3 weeks for 6 weeks orally. Intervention group: Calcium tablet, 500 mg, two times a day for 6 weeks orally. Intervention 2: Control group: Placebo capsule, every 3 weeks for 6 weeks orally. Control group: Placebo tablet, two times a day 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