Screening test with 50 g GCT was offered at
their first visit and those with abnormal results (> 140
mg/dl) were confirmed the diagnosis of GDM with 100
g OGTT. Diagnosis of GDM requires that at least two
of four glucose level of the100 g OGTT meet or exceed
the upper limit of normal. The cut off values for fasting
1, 2and 3 hours blood glucose are > 105, 190, 165,and
145 mg/dl respectively (9). If GDM was not diagnosed,
all women were retested between 28-32 weeks using
the same methods as the first visit(9).