What Are the Symptoms of Gestational Diabetes? (And Why Most People Have None)

Here’s the thing about gestational diabetes symptoms: most people don’t have any.

Many pregnant women develop gestational diabetes and feel completely fine. No thirst, no fatigue, no obvious symptoms of gestational diabetes. Your blood glucose levels (your blood sugar level) can be higher than normal, but you wouldn’t know without a screening test.

That’s why prenatal care includes a routine screening test for gestational diabetes during pregnancy. It’s not because you did something wrong. Gestational diabetes occurs because of hormonal changes and rising hormone levels from the placenta that can increase insulin resistance.

If your body can’t make enough extra insulin to overcome insulin resistance, blood glucose can rise (high blood glucose). Catching it early supports a healthy pregnancy and helps you and your healthcare provider build a diabetes management plan. But first—if you're wondering why this happened, know this: it's not your fault. You can learn more in our post that covers Gestational Diabetes Causes: Why Did I Get It?.

Most people with gestational diabetes feel totally normal

This deserves repeating: you can have gestational diabetes mellitus (GDM) and feel totally normal.

Some women go through pregnancy with high blood glucose levels and no symptoms at all. They find out they’re gestational diabetes diagnosed only when their blood test results come back.

So if you’re thinking, “But I feel fine…”, you’re not alone. Screening is the only reliable way to know.

Possible symptoms (and why they’re confusing)

When symptoms do show up, they can look a lot like regular pregnancy symptoms. Possible symptoms include:

• Increased thirst

• More frequent urination

• Fatigue

• Blurred vision

• More frequent yeast infections

These can happen with high blood sugar, but they can also happen in a completely normal pregnancy.

Julija note: Please don’t use symptoms to self-diagnose. You can’t confirm gestational diabetes without a blood sample and a proper glucose tolerance test.

When do you get tested for gestational diabetes?

Standard timing (most common)

Most pregnant women are screened between 24–28 weeks at a prenatal visit. That’s when placenta hormones often make insulin resistance stronger.

Earlier testing (higher risk situations)

Your provider may test earlier if you have a higher risk, such as:

• A previous pregnancy with gestational diabetes

• Family history of diabetes

• PCOS or known insulin resistance

• Obesity (BMI ≥30)

• Prior macrosomia (>4kg baby)

Even with risk factors, this is not about blame. It’s about getting you the right support.

What tests are used? (glucose screening + OGTT)

Different clinics use different approaches, but common options include:

• Glucose screening test (often the first step)

• Oral glucose tolerance test (OGTT)

These tests measure your glucose levels after you drink a glucose solution.

If you want a calm walkthrough of your choices (including what to expect and what the results mean), read: Blood Sugar Test & Pregnancy: Understanding Your Options.

“I think I have gestational diabetes.” What should I do?

If you’re worried—because of symptoms, risk factors, or just a gut feeling—here’s a simple plan:

1. Message or call your healthcare provider. Ask if you should do a blood test sooner.

2. Don’t self-diagnose. Symptoms are unreliable, and many people have none.

3. Avoid panic changes. Extreme dieting can backfire in pregnancy. Your provider or diabetes educator can help you choose a healthy diet that supports both you and baby.

Myth-busting (the big ones)

• “I’m thirsty, so I must have GD.” Thirst can be pregnancy-related, but mention it at your prenatal visit.

• “I’m peeing constantly, so it’s definitely GD.” Frequent urination is common in pregnancy.

• “I feel fine, so I definitely don’t have it.” Many women with gestational diabetes feel normal.

If you’re diagnosed: what treatment and management can look like

If your results show gestational diabetes, take a breath. This is common, and it’s manageable.

Gestational diabetes treated usually includes:

• Learning how different foods affect your blood sugar

• A balanced, eating healthy approach (not perfection)

• Choosing carbs that work for you (many do well with whole grains, paired with protein/fat/fiber)

• Physical activity (even gentle walks can help some people)

• Checking blood glucose with a meter (your provider will tell you when)

For some women, lifestyle changes aren’t enough because of placenta hormones. That’s when medication can help:

• Insulin injections (insulin is pregnancy-safe and not a “failure”)

• Sometimes oral medications depending on your provider

Your provider may also refer you to a diabetes educator to support disease control and day-to-day diabetes management.

Here’s a calm, step-by-step guide for the first days: Newly diagnosed with gestational diabetes: what to expect and how will this change my life.

Can gestational diabetes affect the baby?

Managing gestational diabetes matters because high blood glucose can affect baby growth.

Possible complications (especially if blood sugar stays high) can include:

• High birth weight (macrosomia): most frequest issue

  Risk: 15–45% with poor control vs. ~10% in general population. (Source)

• Premature birth: often induced early due to monitoring or related issues like preeclampsia

  GDM increases preeclampsia risk ~2x. (Source)

• Neonatal hypoglycemia: baby's overproduction of insulin from high maternal glucose leads to low blood sugar after cord clamp

The reassuring part: with consistent monitoring, diet, and treatment when needed, most women with gestational diabetes deliver healthy babies

After pregnancy: does gestational diabetes go away?

For many people, blood sugar levels return to normal soon after delivery. Your provider will usually recommend a postpartum blood test (often around 6–12 weeks) to confirm.

Having had gestational diabetes does increase the greater risk of developing type 2 diabetes later in life, which is why follow-up screening matters.

Final thoughts

If you’re searching for gestational diabetes symptoms, you’re probably looking for certainty—and I get it.

But the truth is: most people feel normal. That’s why screening tests exist. If you’re concerned, talk to your healthcare provider and ask about testing.

And if you are diagnosed? You can do this. It may feel frustrating at first, but you’ll learn what works for your body, and you’ll have support.

FAQ: Gestational Diabetes Symptoms

1. What are the most common symptoms of gestational diabetes?

Most people don’t have any symptoms. When symptoms happen, they can include increased thirst, peeing more than usual, fatigue, blurry vision, or more frequent yeast infections—but these can also be normal pregnancy symptoms. The only way to know is a pregnancy glucose test.

2. Can you have gestational diabetes and feel fine?

Yes. Many pregnant women with gestational diabetes feel totally normal. That’s why screening tests (usually at 24–28 weeks) are so important.

3. When do gestational diabetes symptoms start?

If symptoms happen, they can show up in the second or third trimester as insulin resistance increases. But many women never notice symptoms at all—gestational diabetes is often found through routine screening.

4. When do you get tested for gestational diabetes?

Most people are screened between 24–28 weeks of pregnancy. If you have a higher risk (like a previous pregnancy with gestational diabetes or a family history), your healthcare provider may test earlier.

5. What’s the difference between the glucose screening test and the OGTT?

A glucose screening test is often the first step. If it’s high, your provider may recommend an oral glucose tolerance test (OGTT), which checks your glucose levels at multiple time points after drinking a glucose solution.

6. What should I do if I think I have gestational diabetes?

Don’t try to self-diagnose based on symptoms. Message your healthcare provider and ask about a glucose test. If you’re feeling overwhelmed, focus on one next step: getting the right test and a clear plan.