A- Overt diabetes — (At first prenatal visit)
- Fasting plasma glucose ≥126 mg/dL, or
- A1C ≥6.5, or
- Random plasma glucose ≥200 mg/dL subsequently confirmed by elevated fasting plasma glucose or A1C, as above
B – Gestational diabetes
- Fasting plasma glucose ≥92 mg/dL at any gestational age (≥126 mg/dL = overt diabetes)
- At 24 to 28 weeks of gestation: 50 gram oral glucose challenge | after 1h:
≥130 (better sensitivity) or ≥140 mg/dL = elevated
↘ 100g 3hr oral GTT for definitive dx – Glucose checked fasting/1h/2h/3h: +if 2/4
values high