Screening and Diagnosis
- Screening for gestational diabetes is part of the antenatal care for pregnant women. It is usually done between 24 and 28 weeks of gestation, or earlier if there are risk factors.
- The screening test involves measuring the blood sugar levels before and after drinking a sugary drink (glucose tolerance test). If the results are abnormal, a diagnosis of gestational diabetes is confirmed.
- The diagnosis criteria are based on the blood sugar levels at different time points after drinking the sugary drink:
Time |
Normal |
Gestational Diabetes |
Fasting (before drinking) |
Less than 92 mg/dL |
92 mg/dL or higher |
1 hour after drinking |
Less than 180 mg/dL |
180 mg/dL or higher |
2 hours after drinking |
Less than 153 mg/dL |
153 mg/dL or higher |
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