Introduction
GDM
GDM, GESTATIONAL DIABETES MELLITUS
Gestational diabetes mellitus (GDM) is one of the common morbidities in pregnancy (Although there is no doubt about the effectiveness of GDM screening and treatment in reducing the risk of adverse outcomes (However, despite several recent large-scale studies, debate continues addressing which of these two clinically recommended screening approaches may better improve pregnancy outcomes (The National Institutes of Health GDM consensus conference proposed a large randomized trial to compare these two approaches with respect to important adverse pregnancy outcomes in different population (Therefore this study aimed to compare the prevalence and maternal and neonatal outcomes of a One-step with a Two-step approach for the screening and diagnosis of GDM in a large community sample of Iranian pregnant women.