Gestational diabetes mellitus (GDM) is one of the most common complications of pregnancy with a prevalence rate varying from 1% to 20% depending on the population studied and diagnostic criteria applied. 1 , 2 With the recent adoption of the International Association of Diabetes and Pregnancy Study Groups Consensus Panel diagnostic criteria, it is estimated that 18% of pregnant women will be diagnosed with GDM. 1 Obesity is strongly associated with risk of GDM, 3 and it is expected that the incidence of GDM among women of reproductive age will further increase as the prevalence of obesity continues to rise among this age group.