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Table 3 IADPSG criteria for diagnosis of GDM and overt diabetes in pregnancy [14]

From: Screening and diagnosis of gestational diabetes mellitus – relevance to low and middle income countries

First prenatal visit

Measure FPG, HbA1c or RPG

Overt diabetes if, FPG ≥ 126 mg/dl (7.0 mmol/l)

Or random plasma glucose ≥ 200 mg/dl (11.1 mmol/l)

Or HbA1c ≥ 6.5 %

GDM if,

FPG ≥ 92 mg/dl (5.1 mmol/l) but <126 mg/dl (7.0 mmol/l)

If the test is normal in the first prenatal visit, test for GDM during 24–28 weeks

24–28 weeks of gestation

75 g OGTT

Pre existing diabetes if

FPG ≥ 126 mg/dl (7.0 mmol/l)

GDM if,

FPG ≥ 92 mg/dl (5.1 mmol/l)

1 h ≥ 180 mg/dl (10.0 mmol/l)

2 h ≥ 153 mg/dl (8.5 mmol/l)