IRCT20160208026446N2 IRCT 2017-12-14 Babol University of Medical Sciences The Impact of Myo- inositol supplementation to gestational diabetes in overweight pregnant women The Impact of Myo- inositol supplementation to prevent gestational diabetes in overweight pregnant women 2017-12-05 anticipated 60 Complete https://irct.ir/trial/21922 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Prevention, Randomization description: Blocked randomization With a block size of 4, for two groups (A, B). Random numbers (0 - 6) was generated using computer software, Blinding description: Blind groups include: participant, clinical caregiver, researcher, outcome evaluator, data analyst. Double blind study. Medications and placebo are coded by someone other than the investigator as group (1 and 2) and the investigator do not know which group is related to the drug. The subjects are satisfied and informed that they may be Instead of medication, placebo is given to them. The distribution method With a block size of 4, for two groups (A, B). Random numbers (0 - 6) was generated using computer software. 3 Diabetes mellitus arising in pregnancy. Intervention 1: Intervention group: Myoinositol supplementation powder the ino fulic commercial name containing 2000 mg of myoinositol and 200 μg of folic acid (manufactured by the company Lo.Li Pharma ) once a day(one sachet per night in a glass of water is dissolved). Intervention 2: : Placebo (folic acid powder 400 mcg + wheat flour total 2 grams) Once a day (one hour a sachet is dissolved in a glass of water) from the gestational age 14 weeks to 24 weeks for a total of 10 weeks . Control group:. 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 There is no further information.