Gestational diabetes mellitus (GDM) is defined as glucose intolerance with onset or first diagnosis during pregnancy, but not to the level of being diagnostic for diabetes in a nonpregnant adult. 1 During pregnancy, maternal tissues become progressively insensitive to insulin due to metabolic changes that ensure adequate nutrition is supplied to the foetus. 2,3 One such change is that insulin-mediated whole-body glucose disposal decreases by 40%-60%, necessitating a 200%-250% increase in insulin secretion in order to maintain a normal blood glucose concentration. 4 GDM develops when a pregnant woman does not produce enough insulin to compensate for this insulin resistance. 2 GDM is a serious, common complication in pregnancy, threatening the health of one in every 7 pregnant women globally, their foetuses and newborns. 5-8 It increases the risk of maternal hypertensive disorders of pregnancy, foetal macrosomia, caesarean section, traumatic injury at birth for both mother and baby and other adverse pregnancy outcomes. 6,7,9 Moreover, GDM is also associated Abstract Gestational diabetes mellitus (GDM) is defined as glucose intolerance with onset or first diagnosis during pregnancy, but not to the level of being diagnostic for diabetes in a nonpregnant adult. In GDM, whole-body insulin-dependent glucose disposal decreases by 40%-60% which necessitates a 200%-250% increase in insulin secretion to maintain normoglycaemia. GDM develops when a pregnant woman does not produce sufficient insulin to compensate for the reduced glucose disposal. Fibroblast