The test should be performed as described by the World Health Organization, using a glucose load of 75 g anhydrous glucose dissolved in water or 1.75 g/kg body wt if weight is <40 pounds (18 kg).

Pregnant women are given 75g anhydrous glucose in 150 ml of water and plasma glucose is estimated after 2 hours This test is done between 11-14 weeks and is used to assess risk of certain ...