Gestational Diabetes: What It Means and How to Manage It

Gestational diabetes is one of those phrases you never really think about until you are pregnant and someone says it to you across a desk. So let me back up and start from the beginning. It is high blood sugar that shows up during pregnancy, only around 6 to 9 women out of every 100 get it, and it is very manageable. Usually somewhere between week 24 and 28, at a routine check-up, your OB checks your blood sugar. They hand you a little bottle of a very sweet drink to finish, and an hour later they take some blood. That drink is my least favorite part of being pregnant, and I have had to get through it twice now, so you have my full sympathy if you are dreading it. But I am really glad the test is standard, because catching this early is the whole reason it is so easy to stay on top of.

What gestational diabetes actually is

Here is what is actually going on inside. While you are pregnant, your placenta pumps out hormones that help your baby grow. The catch is that those same hormones make your body a little less responsive to insulin, the thing that normally keeps your blood sugar steady. Most of the time your pancreas just makes a bit extra and it all evens out. Sometimes it cannot quite keep up, your blood sugar drifts higher than it should, and that is gestational diabetes.

It tends to turn up in the second or third trimester, and this is the bit I really want you to hear: anyone can get it, even with zero risk factors. So if your result came back high, please do not spend the next few months hunting for the thing you did wrong. You did not do this. Your hormones did.

How it is diagnosed

I mentioned the sweet drink, so here is how that test actually goes. The first one is the one-hour glucose challenge: you drink the sugary liquid, sit and wait an hour, and they take your blood. If that number is fine, you are done, that really is the whole thing. If it comes back high, they bring you back for a longer three-hour version to know for certain. And a high first result is unsettling, I know, but it is not a diagnosis by itself. It just means they want a closer look.

Managing it day to day

The day to day is more doable than it sounds, especially once it settles into a routine. Most of it comes down to four things.

What you do	Why it helps
Check your blood sugar	Shows you which meals and habits keep your numbers steady
Adjust how you eat	Pairing carbs with protein and fiber slows sugar spikes
Move after meals	A short walk helps your body use up sugar in the blood
Medication if needed	Insulin or pills keep numbers safe when food and movement are not enough

On the food side, nobody is taking your carbs away. You just spread them out across the day and pair them with something. Toast on its own will spike you, toast with peanut butter will not, same toast. Smaller meals more often usually keep things steadier than three big plates. Your team will probably set you up with a dietitian, and take that appointment, it is one of the most useful hours you will get out of all this. Write your questions down before you go, because you will forget half of them in the room. And when you want real meals built on these rules, we have a whole page of gestational diabetes recipes to get you started.

A little walk after you eat, even ten minutes, does more for your post-meal number than you would expect. No gym, no plan needed. Up and down the hallway counts.

If you need medication

Some women do everything right and still need insulin or pills. That is not you failing, and it is not you not trying hard enough. Sometimes the hormones just win, and medication is the safest, kindest thing you can do for you and the baby. Plenty of people take it and sail through the rest of pregnancy without a hitch.

What it means for your baby

When your blood sugar stays in a good range, the large majority of babies come out healthy and a normal size. The stuff people worry about, a bigger baby, or the baby’s blood sugar dropping after birth, is mostly tied to sugar that runs high and unwatched for a long time. That is the entire reason for all the finger pricks and checks. It can feel like a lot of fuss over you, but you are really just keeping things on track.

I did not have gestational diabetes myself, but two of my closest friends did, and honestly, you would never have guessed it from the outside. They kept an eye on their numbers, got on with their pregnancies, and had these perfectly healthy, beautiful babies. That is the version of this I want you holding onto, not the scary one you find at 2am.

When to call your provider

Call your care team if your numbers keep coming in above the targets they gave you, if you feel shaky, sweaty, confused, or strangely dizzy (those can mean your sugar has dropped too low), or if your baby is moving a lot less than normal. Trust your gut here. If something feels off, calling is never an overreaction, and your team would much rather hear from you. And if it feels like an emergency, forget all of this and call your local emergency number right away.

For more on looking after yourself through these months, take a look at our bigger guide to a healthy pregnancy.

Medical disclaimer: This article is for general educational purposes only and is not medical advice. It does not replace care from a doctor, midwife, or other qualified professional. Always follow the guidance of your own care team about screening, blood sugar targets, diet, and medication. If you think you may be experiencing a medical emergency, contact your local emergency services right away.

Sources

• American College of Obstetricians and Gynecologists. “Gestational Diabetes.” 2024.
• National Institute of Diabetes and Digestive and Kidney Diseases (NICHD/NIDDK). “Gestational Diabetes.” 2023.
• Centers for Disease Control and Prevention. “Gestational Diabetes and Pregnancy.” 2024.
• Diabetes UK. “Gestational Diabetes.” 2024.