Gestational Diabetes Mellitus

What is Gestational Diabetes Mellitus?

Gestational diabetes mellitus is a form of high blood sugar that develops during pregnancy. It occurs when your body cannot make enough insulin to meet the extra needs of pregnancy. Insulin is a hormone that helps sugar move from your bloodstream into your cells for energy.

This condition typically appears around week 24 to 28 of pregnancy. It affects how your cells use sugar and causes high blood glucose levels. Most women with gestational diabetes have healthy pregnancies and babies with proper management. However, it does require monitoring and lifestyle changes to keep blood sugar in a safe range.

Gestational diabetes usually goes away after delivery. But women who have had it face higher risk of developing type 2 diabetes later in life. That makes postpartum monitoring and healthy lifestyle choices important for long-term health.

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Symptoms

Many women with gestational diabetes have no obvious symptoms. When symptoms do occur, they may include:

Increased thirst and drinking more fluids than usual
Frequent urination beyond normal pregnancy changes
Fatigue that goes beyond typical pregnancy tiredness
Dry mouth even after drinking water
Blurred vision or difficulty focusing
Nausea that develops later in pregnancy

Because symptoms are often mild or absent, routine screening during pregnancy is essential. Most cases are found through standard prenatal testing between weeks 24 and 28.

Causes and risk factors

Gestational diabetes happens when pregnancy hormones make your cells more resistant to insulin. Your pancreas usually produces extra insulin to compensate. When it cannot keep up with this increased demand, blood sugar levels rise. The exact cause varies, but several risk factors increase your chances of developing this condition.

Risk factors include being over age 25, having a body mass index over 30, previous gestational diabetes, family history of type 2 diabetes, and belonging to certain ethnic groups with higher diabetes rates. Previous delivery of a baby weighing over 9 pounds also raises risk. Women with polycystic ovary syndrome face increased likelihood as well. Having prediabetes before pregnancy or gaining excessive weight during pregnancy can contribute to development of gestational diabetes.

How it's diagnosed

Healthcare providers typically screen for gestational diabetes between weeks 24 and 28 of pregnancy using a glucose challenge test or oral glucose tolerance test. These tests measure how your body processes sugar. Women with risk factors may be screened earlier in pregnancy to check for pre-existing undiagnosed diabetes.

Hemoglobin A1c testing can help identify pre-existing diabetes that was present before pregnancy but not yet diagnosed. After delivery, A1c testing helps monitor your glucose status and assess diabetes risk going forward. Rite Aid offers Hemoglobin A1c testing to help you track your blood sugar control in the months and years after pregnancy. Regular postpartum screening is important because gestational diabetes increases your lifetime risk of type 2 diabetes.

Treatment options

Monitor blood sugar levels several times daily using a glucose meter
Follow a balanced meal plan with controlled carbohydrate portions throughout the day
Engage in regular moderate physical activity like walking for 30 minutes most days
Work with a registered dietitian to create meal plans that stabilize blood sugar
Take insulin injections if diet and exercise alone do not control blood sugar levels
Attend all prenatal appointments to monitor baby's growth and your glucose control
Check blood sugar levels postpartum and get tested for diabetes 6 to 12 weeks after delivery
Maintain healthy weight and active lifestyle after pregnancy to reduce future diabetes risk
Consider breastfeeding, which may help lower your long-term diabetes risk

Frequently asked questions

Gestational diabetes develops only during pregnancy and usually resolves after delivery. Type 2 diabetes is a chronic condition that persists over time. However, having gestational diabetes significantly increases your risk of developing type 2 diabetes later in life, with up to 50% of women developing it within 10 years after pregnancy.

With proper management, most women with gestational diabetes have healthy babies. Uncontrolled gestational diabetes can lead to larger birth weight, breathing problems at birth, or low blood sugar in the newborn. Close monitoring and following your treatment plan greatly reduce these risks.

You cannot completely prevent gestational diabetes, but you can lower your risk. Maintaining a healthy weight before pregnancy, eating a balanced diet, and staying physically active all help. If you have had gestational diabetes before, these lifestyle factors become even more important in future pregnancies.

Most women are screened between weeks 24 and 28 of pregnancy. If you have risk factors like previous gestational diabetes, obesity, or family history of diabetes, your provider may test you earlier. Early screening can identify pre-existing diabetes that was not diagnosed before pregnancy.

Focus on whole grains, lean proteins, healthy fats, and plenty of vegetables. Spread carbohydrates evenly throughout the day rather than eating large amounts at once. Avoid sugary drinks, processed foods, and refined carbohydrates that cause rapid blood sugar spikes. A dietitian can help you create specific meal plans.

Many women manage gestational diabetes with diet and exercise alone. About 10 to 20% of women need insulin to keep blood sugar in a safe range. If lifestyle changes do not control your glucose levels, your healthcare provider will discuss insulin therapy with you.

Gestational diabetes usually resolves after delivery once pregnancy hormones return to normal. However, you should get tested 6 to 12 weeks postpartum to confirm your blood sugar has normalized. Continue regular screening every 1 to 3 years because your diabetes risk remains elevated for life.

Yes, moderate exercise is beneficial and helps control blood sugar levels. Walking, swimming, and prenatal yoga are generally safe options. Aim for 30 minutes of activity most days of the week. Always check with your healthcare provider before starting any exercise program during pregnancy.

Most women check their blood sugar 4 times daily. This typically includes one fasting reading in the morning and three readings after meals. Your healthcare provider will give you specific target ranges and tell you when to check based on your individual situation.

Hemoglobin A1c measures your average blood sugar over the past 2 to 3 months. While not the primary test during pregnancy, it can identify pre-existing diabetes and helps monitor your glucose status after delivery. Regular A1c testing postpartum helps catch type 2 diabetes early when it is easier to manage.