A pregnant client completes the 1-hour glucose tolerance test (GTT) at 26 weeks' gestation. The nurse explains that if the blood glucose result is above ____ to ____mg/dL. It is considered a positive screening and the client will need a 3-hour oral glucose tolerance test.

The 1-hour GTT is a screening test for gestational diabetes mellitus (GDM) performed between 24–28 weeks of gestation. The client drinks a 50-gram glucose solution, and blood glucose is measured 1 hour later. A result ≤130–140 mg/dL is considered normal, indicating the client is unlikely to have GDM. A result above 130–140 mg/dL is considered positive, prompting a 3-hour, 100-gram OGTT to confirm the diagnosis.