IRCT201604195623N76 IRCT 2016-05-01 Vice chancellor for research, Kashan University of Medical Sciences Effect of supplementation in treatment of women with gestational diabetes Clinical trial of the effect of zinc supplementation compared with the placebo on expressed levels of insulin receptor, PPAR-alpha and GLUT4 genes in newborns of women with gestational diabetes 2016-02-20 anticipated 50 Complete https://irct.ir/trial/6106 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: At study baseline and after stratification for pre-intervention BMI and age, subjects will be randomly divided into two groups to take either supplements (n = 25) or placebo (n = 25). 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 gynecology 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. 3 Gestational diabetes. Intervention 1: Intervention group: Zinc supplements, 30 mg, 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.