Introduction
The prevalence of gestational diabetes mellitus (GDM) has
been shown to be between 0.7% and 7.4% [1e7]. The early
diagnosis of GDM is important to reduce adverse pregnancy
outcomes. The current consensus on glucose tolerance testing
during pregnancy involves the use of a 75-g oral glucose
tolerance test (OGTT). The Hyperglycemia and Adverse
Pregnancy Outcome (HAPO) study, a large multicenter trial
(15 centers with approximately 25,000 women) using the 75-g
OGTT, was recently published [8], and the results of this study
were supported by the International Association of Diabetes