Gestational Diabetes
Also known as: Gestational Diabetes Mellitus, GDM
Gestational diabetes is a form of high blood sugar that develops during pregnancy in women who did not have diabetes before. It typically develops in the second or third trimester when placental hormones interfere with insulin action. With proper management, most women have healthy pregnancies, but it increases the future risk of type 2 diabetes.
Symptoms
Causes
- Insulin resistance caused by placental hormones
- Inability of the pancreas to produce enough insulin to overcome resistance
- Genetic predisposition to insulin resistance
Risk Factors
- Overweight or obesity before pregnancy (BMI ≥25)
- Age over 25
- Family history of type 2 diabetes
- Previous gestational diabetes
- Polycystic ovary syndrome
- African American, Hispanic, Native American, Asian, or Pacific Islander descent
Diagnosis
- Glucose challenge test (GCT) at 24–28 weeks of pregnancy
- Oral glucose tolerance test (OGTT) for confirmation
- Early screening for high-risk women at the first prenatal visit
- Hemoglobin A1c to detect pre-existing diabetes
Treatment
- Medical nutrition therapy with controlled carbohydrate intake
- Regular physical activity as recommended by your provider
- Blood glucose self-monitoring (fasting and post-meal levels)
- Insulin therapy if diet and exercise do not achieve targets
- Metformin or glyburide as alternatives in some cases
- Increased fetal monitoring and delivery planning
Prevention
- Achieve a healthy weight before pregnancy
- Eat a balanced, nutrient-rich diet
- Exercise regularly before and during pregnancy
When to See a Doctor
- You are pregnant and have risk factors for gestational diabetes
- Routine screening tests show elevated blood sugar
- You experience increased thirst, urination, or fatigue during pregnancy
- You had gestational diabetes in a previous pregnancy
Frequently Asked Questions
Related Conditions
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