Gestational diabetes mellitus (GDM) is manifested by carbohydrate intolerance that develops during pregnancy and is associated with adverse maternal and neonatal outcomes. 1 In 2014, the US Preventive Services Task Force made a recommendation to screen all pregnant women for GDM at or beyond 24 weeks of gestation. 2 Screening is generally performed using the two steps approach: a 50-g glucose challenge test (GCT) at 24-28 weeks, followed by a diagnostic 100-g oral glucose tolerance test (OGTT) for those who screen positive. Women with increased risk for GDM (obesity, previous GDM, strong family history of diabetes, or previous macrosomia) are advised to directly undergo the diagnostic OGTT. GDM is classically diagnosed by two or more abnormal

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