If you’ve been diagnosed with gestational diabetes, the core of your management plan comes down to three things: adjusting what and how you eat, staying physically active, and monitoring your blood sugar multiple times a day. Most people with gestational diabetes can keep their blood sugar in a healthy range with these lifestyle changes alone. When that’s not enough, insulin is the recommended treatment. Here’s what each part of that plan looks like in practice.
Blood Sugar Targets to Aim For
You’ll be checking your blood sugar at least four times a day: once first thing in the morning (fasting) and after each meal. Your healthcare team will give you a glucose meter and show you how to use it. The targets you’re trying to hit are:
- Fasting (morning, before eating): 95 mg/dL or below
- One hour after a meal: 140 mg/dL or below
- Two hours after a meal: 120 mg/dL or below
Your provider may ask you to track either the one-hour or two-hour post-meal number, not necessarily both. Keeping a log of your readings helps your team spot patterns, like consistently high numbers after breakfast, that guide adjustments to your eating plan or treatment.
How to Eat With Gestational Diabetes
The biggest shift is learning to manage carbohydrates, since carbs are what raise your blood sugar the most. You don’t need to eliminate them. Your body and your baby need carbs for energy. The goal is to eat the right amount, spread evenly throughout the day, and always pair them with protein or healthy fat to slow digestion.
For most people with gestational diabetes, 30 to 45 grams of carbohydrates per meal works well, with snacks containing 15 to 30 grams. That’s roughly one to two servings of a starchy food per meal. A slice of whole-grain bread has about 15 grams, a cup of rice about 45 grams, and a medium apple about 25 grams. Reading nutrition labels becomes a daily habit.
Breakfast tends to be the trickiest meal. Hormone levels that raise blood sugar are highest in the morning, so many people find that cereal, toast, or fruit that would be fine at lunch spike their numbers at breakfast. Protein-heavy breakfasts (eggs, Greek yogurt, cheese) with a small amount of carbs often work better. A dietitian who specializes in diabetes can help you build a meal plan that fits your preferences and keeps your numbers in range.
Eating three moderate meals and two to three snacks a day, rather than two or three large meals, helps prevent both spikes and drops. A bedtime snack that combines protein and a small amount of carbohydrate (like cheese with a few crackers or a handful of nuts with a small piece of fruit) can help keep your fasting blood sugar stable overnight.
Exercise and Blood Sugar
Physical activity lowers blood sugar directly by helping your muscles absorb glucose without needing as much insulin. A 15- to 30-minute walk after a meal can noticeably bring down your post-meal numbers, sometimes enough to keep them within target when food changes alone don’t quite get there.
The general recommendation is at least 30 minutes of moderate-intensity activity, like brisk walking or swimming, a minimum of three times per week, with no more than two consecutive days off. If you weren’t active before pregnancy, start with 15 minutes of walking three times a week and gradually increase. Resistance exercises like bodyweight squats, resistance bands, or prenatal Pilates two to three times a week on non-consecutive days provide additional blood sugar benefits. Avoid continuous exercise sessions longer than 45 minutes, as prolonged activity can raise fetal temperature.
When You Need Insulin
If your blood sugar numbers stay above target despite consistent dietary changes and exercise, your provider will recommend insulin. This is the preferred medication for gestational diabetes because it doesn’t cross the placenta to your baby. You may have heard of oral medications like metformin, but current guidelines from the American Diabetes Association recommend against using them as a first-line treatment because they do cross the placenta, and long-term safety data for the baby is limited.
Needing insulin doesn’t mean you’ve failed at managing your diabetes. As pregnancy progresses, the placenta produces increasing amounts of hormones that make your body more resistant to insulin. Some people’s bodies simply can’t keep up, regardless of how carefully they eat. Your provider will teach you how to inject insulin (the needle is very small and most people find it less painful than the finger pricks for blood sugar testing) and will adjust your dose as your pregnancy progresses.
What Happens at Your Prenatal Visits
Your care team may expand to include a dietitian or a certified diabetes care and education specialist. A dietitian helps you turn blood sugar data into practical meal adjustments. A diabetes educator helps you fit the daily routine of testing, eating, and tracking into your real life, including problem-solving for situations like eating out, holidays, or days when your schedule falls apart.
Starting around 32 weeks, your provider will likely begin monitoring your baby more closely with a biophysical profile, an ultrasound that checks your baby’s movement, muscle tone, breathing practice, and amniotic fluid levels. Non-stress tests, which track your baby’s heart rate patterns, typically start around 36 weeks. These are done weekly unless results suggest a need for more frequent checks. The goal is to confirm your baby is tolerating the pregnancy well.
Delivery Timing
When you deliver depends on how your blood sugar has been controlled and whether you’re on insulin. If your gestational diabetes is well controlled with diet and exercise alone, guidelines recommend waiting for labor to begin on its own, up to about 40 weeks and 6 days, with induction if it hasn’t started by then. Many providers will discuss induction between 39 and 40 weeks based on your individual situation.
If you’re on insulin, the recommended delivery window is tighter: 39 weeks to 39 weeks and 6 days. Waiting longer increases the risk of the baby growing too large, which raises the chance of complications like shoulder dystocia (where the baby’s shoulder gets stuck during delivery). Your provider will factor in your blood sugar control, your baby’s estimated size on ultrasound, and your cervical readiness when planning the timing.
After the Baby Arrives
For most people, blood sugar returns to normal almost immediately after delivery, once the placenta (the source of all those insulin-blocking hormones) is gone. You’ll typically stop checking your blood sugar and stop insulin if you were on it.
But gestational diabetes signals that your body has trouble handling glucose under metabolic stress, and that vulnerability doesn’t disappear. Up to 30% of people still show abnormal glucose tolerance at their postpartum screening, and the lifetime risk of developing type 2 diabetes is significantly elevated. You’ll need a glucose tolerance test 6 to 12 weeks after delivery to check where you stand, and then periodic screening going forward, typically every one to three years.
The same habits that managed your gestational diabetes, moderate carbohydrate intake, regular physical activity, and maintaining a healthy weight, are the most effective ways to delay or prevent type 2 diabetes long-term. Breastfeeding also appears to improve insulin sensitivity in the months after delivery, giving you an additional physiological advantage during that transition.