Table 2.

Classification and diagnostic criteria for hyperglycemia in pregnancy

Organization	Results
IADPSG/EBCOG (30,36)
GDM	75-g 2-hour OGTT  Fasting glucose 5.1-6.9 mmol/L  1-hour glucose ≥ 10.0 mmol/L  2-hour glucose 8.5-11.0 mmol/L
Overt diabetes during pregnancy	Fasting glucose ≥ 7.0 mmol/L Random glucose ≥ 11.1 mmol/La HbA1c ≥ 6.5%
WHO/FIGO/ADIPS (11,32,33)
GDM	75-g 2-hour OGTT  Fasting glucose 5.1-6.9 mmol/L  1-hour glucose ≥ 10.0 mmol/L  2-hour glucose 8.5-11.0 mmol/L
Diabetes mellitus in pregnancy	Fasting glucose ≥ 7.0 mmol/L 2-hour glucose ≥ 11.1 mmol/L post 75-g OGTT Random glucose ≥ 11.1 mmol/L in the presence of diabetes symptoms
ADA (41)
GDM	1-step strategy: 75-g 2-h OGTT  Fasting glucose ≥ 5.1 mmol/L  1-hour glucose ≥ 10.0 mmol/L  2-hour glucose ≥ 8.5 mmol/L	2-step strategy: 50-g 1-hour GCT ≥ 7.8 mmol/L 100 g 3-hour OGTT  Carpenter and Coustan (17) or  Fasting glucose ≥ 5.3 mmol/L  1-hour glucose ≥ 10.0 mmol/L  2-hour glucose ≥ 8.6 mmol/L  3-hour glucose ≥ 7.8 mmol/L	NDDG (13)  Fasting glucose ≥ 5.8 mmol/L  1-h glucose ≥ 10.6 mmol/L  2-h glucose ≥ 9.2 mmol/L  3-h glucose ≥ 8.0 mmol/L
Type 2 diabetes mellitus	Fasting glucose ≥ 7.0 mmol/L 2-hour glucose ≥ 11.1 mmol/L post 75 g 2-hour OGTT Random glucose ≥ 11.1 mmol/L in the presence of diabetes symptoms HbA1c ≥ 6.5%

75-g 2-hour OGTT: only 1 plasma glucose level needs to be elevated for the diagnosis of GDM. 100 g 3-hour OGTT: at least 2 plasma glucose levels need to be elevated for the diagnosis of GDM.

Abbreviations: ADA, American Diabetes Association; ADIPS, Australasian Diabetes in Pregnancy Association; EBCOG, European Board & College of Obstetrics and Gynaecology; FIGO, International Federation of Gynecology and Obstetrics; GCT, glucose challenge test; HbA1c, hemoglobulin A1c; IADPSG/; International Association of the Diabetes and Pregnancy Study Groups; GDM, gestational diabetes mellitus; OGTT, oral glucose tolerance test; WHO, World Health Organization.

^aThe IADPSG recommends confirmation by fasting plasma glucose or HbA1c for the diagnosis of overt diabetes during pregnancy (30).