In plain words
Postprandial glucose is the level of sugar in the blood after a meal. It rises after eating and then comes back down as the body clears it. In pregnancy, the body becomes less responsive to insulin, so sugar can stay higher for longer after meals. That is a normal change, and most of the time it is harmless. It matters because very high after-meal readings can be a sign of . The amount of carbohydrate, the type of food, the fiber, and the protein and fat eaten with it all affect the rise. Mornings tend to be the hardest time for blood sugar in pregnancy. Gestational diabetes is checked with specific tests and readings, and your provider will tell you which numbers they are watching.
The deeper version
Postprandial glucose excursion depends on carbohydrate load, glycemic index and load, fiber, co-ingested protein and fat, meal sequence, and time of day. rises across gestation through placental hormones including , progesterone, and cortisol, and it is highest in the morning because of diurnal cortisol and growth hormone rhythms. Post-meal glucose targets for pregnancy are set in the ADA Standards of Care in Diabetes (2024) and by ACOG Practice Bulletin 190 (2018) on gestational diabetes, which use one- and two-hour thresholds and fasting values. Continuous glucose monitoring is increasingly studied in pregnancy. The main controversy is whether tighter post-meal targets improve neonatal outcomes compared with fasting-based targets alone.
Where it comes up
- Blood sugar, dizziness, and energy crashesPregnancy: Eating
- Eating with gestational diabetesPregnancy: Eating
- Gestational diabetesPregnancy: Your Body
- What to eat in pregnancy: the short versionPregnancy: Eating
What mothers here say about postprandial glucose
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Sources
- American Diabetes Association — Standards of Care in Diabetes: Management of Diabetes in Pregnancy (2024)
- American College of Obstetricians and Gynecologists — Practice Bulletin 190: Gestational Diabetes Mellitus (2018)