Pregnancy is associated with insulin resistance (IR) and hyperinsulinemia that may predispose some women to develop diabetes. Gestational diabetes has been defined as any degree of glucose intolerance with an onset, or first recognition during pregnancy.1 This definition does not exclude the possibility that unrecognized glucose intolerance may have antedated the pregnancy, and so, the term hyperglycemia in pregnancy emerges to be more appropriate as suggested lately by the Endocrine Society.2 The International Association of Diabetes and Pregnancy Study Groups (IADPSG) classify hyperglycemia first detected during pregnancy as either ‘overt diabetes’ or ‘gestational diabetes mellitus (GDM)’.3 In 2013, the World Health Organization (WHO) recommended that hyperglycemia first detected during pregnancy be classified as either ‘diabetes mellitus (DM) in pregnancy’ or ‘GDM’.4