Maternal and newborn effects of gestational diabetes mellitus: A prospective cohort study

•In the first 3 months, the weight gain of infant born from GDM mothers were 53% higher than infant born from GDM free mothers.•In the consecutive 6 months, the risk of infectious disease episodes was 2.15 folds higher among infants born from GDM mothers.•The mean serum vitamin D levels of neonate born from GDM mothers is 22.71 ng/ml, while for neonate born from GDM free mothers is 24.56 ng/ml.•The mean serum zinc level for newborn from GDM mothers is 0.64 μg/ml and for GDM free mothers is 0.82 μg/ml.•The incidence density for wound infection among GDM C/S women is 78/1228 person week.