Gestational diabetes (GD) affects up to 10% of pregnancies in the US each year, according to the CDC. It often develops without obvious symptoms, which is why routine screening is so important. But some women do notice subtle changes. Knowing what to look for can help you have a more informed conversation with your doctor.
What Is Gestational Diabetes?
Gestational diabetes is a type of diabetes that first appears during pregnancy, usually in the second or third trimester. It happens when the placenta produces hormones that make it harder for your body to use insulin effectively. This is called insulin resistance.
When your body can’t produce enough extra insulin to overcome this resistance, blood sugar levels rise. That’s when gestational diabetes develops. It’s different from pre-existing type 1 or type 2 diabetes, which are diagnosed before pregnancy.
In practice, most cases are managed with diet, exercise, and sometimes medication. Without treatment, GD can lead to complications for both you and your baby, including a higher risk of a large birth weight, preterm birth, and preeclampsia.
Early Warning Signs to Watch For
Many women with gestational diabetes have no symptoms at all. That’s why the American College of Obstetricians and Gynecologists (ACOG) recommends screening for all pregnant women between 24 and 28 weeks. However, some women may experience subtle signs that are easy to dismiss as normal pregnancy complaints.
Here are the most common early warning signs:
- Increased thirst: Feeling unusually thirsty even after drinking water.
- Frequent urination: Needing to pee more often than usual, especially at night.
- Fatigue: Feeling more tired than expected, even after rest.
- Blurred vision: Temporary changes in eyesight.
- Unexplained weight loss: Losing weight despite eating normally.
- Increased infections: More frequent urinary tract infections, yeast infections, or skin infections.
- Nausea or vomiting: Persistent nausea that doesn’t go away after the first trimester.
These signs can also be caused by other conditions, so having one or two doesn’t mean you have GD. But if you notice several, it’s worth mentioning to your healthcare provider.
Why These Symptoms Happen
When blood sugar is high, your kidneys work harder to filter and absorb the excess glucose. This leads to more urine production, which in turn makes you dehydrated and thirsty. The extra urination also disrupts sleep, contributing to fatigue.
High blood sugar can affect the lens of your eye, causing temporary blurriness. And because sugar feeds bacteria and yeast, it can increase the risk of infections. These symptoms are your body’s way of signaling that something is off.
Who’s at Higher Risk?
Some women are more likely to develop gestational diabetes than others. Knowing your risk factors can help you and your doctor decide on early screening.
- Age: Women over 25 have a higher risk.
- Weight: Being overweight or obese before pregnancy.
- Family history: A parent or sibling with diabetes.
- Personal history: Having GD in a previous pregnancy.
- Ethnicity: Higher risk in African American, Hispanic, Native American, and Asian American women.
- Other conditions: Polycystic ovary syndrome (PCOS), high blood pressure, or heart disease.
- Previous baby: Having a baby weighing over 9 pounds at birth.
If you have any of these risk factors, your doctor may recommend early screening, sometimes as early as your first prenatal visit.
How Gestational Diabetes Is Diagnosed
Diagnosis usually involves a two-step process. First, you’ll drink a sugary solution and have your blood drawn an hour later. This is called the glucose challenge test. If your blood sugar is elevated, you’ll need a longer test called the oral glucose tolerance test (OGTT).
For the OGTT, you’ll fast overnight, have your blood drawn, drink a glucose solution, and then have your blood drawn again every hour for two to three hours. The results will show whether your body is processing sugar properly.
Some doctors use a one-step test, but the two-step approach is more common in the US. The exact criteria for diagnosis can vary, so ask your provider about their specific thresholds.
What Happens If You’re Diagnosed?
A diagnosis of gestational diabetes can feel overwhelming, but it’s manageable. In most cases, you can control your blood sugar with lifestyle changes. Your doctor will likely recommend:
- Diet changes: Eating smaller, more frequent meals and limiting refined carbohydrates.
- Regular exercise: Walking or swimming for 30 minutes most days.
- Blood sugar monitoring: Checking your levels several times a day.
- Medication: If diet and exercise aren’t enough, you may need insulin or oral medication.
About 70-85% of women with GD can manage it with lifestyle changes alone, according to the American Diabetes Association. The rest may need medication.
Your provider will also monitor your baby’s growth more closely. If your blood sugar stays high, your baby may grow larger than average, which can lead to a more difficult delivery.
Prevention and Long-Term Outlook
You can’t always prevent gestational diabetes, but you can lower your risk. Maintaining a healthy weight before pregnancy, eating a balanced diet, and staying active can help.
If you do develop GD, it usually goes away after you give birth. However, having it increases your risk of developing type 2 diabetes later in life. About 50% of women with GD develop type 2 diabetes within 5 to 10 years, according to the CDC.
That’s why it’s important to get tested for diabetes 6 to 12 weeks after delivery and then every 1 to 3 years after that. Breastfeeding can also lower your risk and your baby’s risk of developing diabetes later on.
Conclusion
Gestational diabetes often has no obvious symptoms, which is why routine screening is so important. If you notice increased thirst, frequent urination, fatigue, or other subtle signs, don’t ignore them. Talk to your doctor. Early detection and management can keep you and your baby healthy.
Q: Can gestational diabetes go away on its own?
Gestational diabetes usually resolves after delivery, but it requires management during pregnancy. Without treatment, it can cause complications like high birth weight and preterm birth. Even if it goes away, your risk of type 2 diabetes later increases, so follow-up testing is important.
Q: What are the silent signs of gestational diabetes?
Many women have no symptoms. Some may notice increased thirst, more frequent urination, fatigue, or blurred vision. These can be mistaken for normal pregnancy changes. Screening at 24 to 28 weeks is the most reliable way to detect it.
Q: How early can gestational diabetes be detected?
It’s typically screened at 24 to 28 weeks. If you have risk factors like obesity, family history, or previous GD, your doctor may test earlier, sometimes at your first prenatal visit. Early detection helps prevent complications.
Q: Does gestational diabetes affect the baby?
Yes, if untreated, it can lead to a larger baby, preterm birth, and breathing problems. It also raises the risk of obesity and type 2 diabetes in the child later. Managing blood sugar reduces these risks significantly.
Q: Can I prevent gestational diabetes?
You can lower your risk by maintaining a healthy weight, eating a balanced diet, and exercising regularly before and during pregnancy. But it’s not always preventable. Genetics and hormonal changes play a role.
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