Table 2— Diagnosis of GDM with a 100-g or 75-g glucose load

mg/dl mmol/l

100-g Glucose load
 Fasting 95 5.3
 1-h 180 10.0
 2-h 155 8.6
 3-h 140 7.8
75-g Glucose load
 Fasting 95 5.3
 1-h 180 10.0
 2-h 155 8.6

Two or more of the venous plasma concentrations must be met or exceeded for a positive diagnosis. The test should be done in the morning after an overnight fast of between 8 and 14 h and after at least 3 days of unrestricted diet (>=150 g carbohydrate per day) and unlimited physical activity. The subject should remain seated and should not smoke throughout the test.