Gestational Diabetes: Passing the Test, and Exactly What Happens If You Don't

Around 24–28 weeks, you'll be handed a bottle of intensely sweet orange drink and sent to get your blood drawn. The glucose screening for gestational diabetes is one of pregnancy's most dreaded appointments—partly because of the drink, partly because of the fear of "failing." Here's what actually happens and why a diagnosis is far from the end of the world.

This is general education, not medical advice. Your provider will guide your specific testing and care.

What Gestational Diabetes Is

Gestational diabetes (GD) is high blood sugar that develops during pregnancy, when pregnancy hormones interfere with how your body uses insulin. It's common, it usually resolves after birth, and—importantly—it's very manageable. But left unaddressed, high blood sugar can affect your baby (including growing larger than average) and your pregnancy, which is why everyone gets screened.

How the Test Works

• The 1-hour screen: You drink the glucose solution, wait an hour, and get your blood drawn. No fasting usually required.
• If that's elevated: You're asked back for a 3-hour test (this one involves fasting and several blood draws). The 1-hour screen is just a screen—a high result doesn't mean you have GD, only that you need the more definitive test.

Don't Try to "Game" the Test

It's tempting to crash-diet or avoid sugar for days beforehand to "pass." Resist that:

• The test exists to protect your baby, not to judge you. A false pass helps no one.
• Eat normally in the days before (follow any specific instructions your provider gives).
• "Passing" by gaming it just means undetected high blood sugar—the opposite of what you want.

The goal isn't a clean result; it's an accurate one.

What Happens If You're Diagnosed

First: a GD diagnosis is not a failure, and it's not caused by eating too much sugar or "doing pregnancy wrong." It's largely about hormones and how your individual body responds. Here's what typically follows:

• Dietary changes, often with a dietitian—balancing carbs, pairing them with protein, spreading meals out.
• Blood sugar monitoring, usually a few finger-pricks a day, to see how your body responds.
• Movement, like a walk after meals, which helps lower blood sugar.
• Medication or insulin if diet and exercise aren't enough—common, safe in pregnancy, and not a personal failing.

Most people with GD manage it well and go on to have healthy babies.

How It Can Affect Your Birth

Depending on how your GD is controlled, your team may:

• Monitor the baby's growth more closely (GD can lead to a larger baby)
• Watch for and manage your blood sugar in labor and your baby's afterward
• Discuss timing of delivery, sometimes recommending not going too far past your due date

None of this means you can't have the birth experience you're hoping for—it just means a bit more monitoring. Bring your preferences to the conversation.

The Bottom Line

The glucose test is a quick screen, not a verdict—and a high 1-hour result just means a follow-up. Don't game it; an accurate result protects your baby. And if you're diagnosed, GD is common, manageable, not your fault, and compatible with a healthy pregnancy and birth.

If GD affects your labor plans, capture your preferences with our birth plan builder—and track your pregnancy week by week with our growth tracker.