Screening for and diagnosis of GDM
| Perform a 75-g OGTT, with plasma glucose measurement fasting and at 1 and 2 h, at 24–28 weeks of gestation in women not previously diagnosed with overt diabetes. |
| The OGTT should be performed in the morning after an overnight fast of at least 8 h. |
| The diagnosis of GDM is made when any of the following plasma glucose values are exceeded: • Fasting: ≥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) |