When is screening for gestational diabetes recommended during pregnancy?

Screening for gestational diabetes is recommended to take place between 24 and 28 weeks of gestation. This timing is based on guidelines from organizations such as the American College of Obstetricians and Gynecologists (ACOG) and the American Diabetes Association (ADA), which highlight that screening during this period is optimal for identifying women who may develop diabetes during pregnancy.

This timeframe captures the majority of women who are at risk, allowing for early intervention and management if necessary, which can significantly reduce the risk of complications for both the mother and the baby. Gestational diabetes can develop at different times during pregnancy; however, the physiological changes in glucose metabolism that typically occur in the second trimester make this window particularly important for screening.

Earlier or later screenings may miss cases, as gestational diabetes may not manifest until later in the pregnancy or may not be detected if assessed too soon. Therefore, the recommended screening timeframe ensures a balance of effectiveness and safety for both mother and child.