Question: Is there a way to prevent gestational diabetes from coming back in this pregnancy?
There is no guaranteed way to prevent gestational diabetes from returning. Having it in a previous pregnancy increases the chance that it may happen again.
You can still improve your chances of a healthy pregnancy by starting prenatal care early, asking about early glucose testing, eating balanced meals, staying active when your obstetrician says it is safe, and gaining weight within the range recommended for you. Do not try to lose weight during pregnancy unless your doctor specifically advises it.
Answer by Dr. Albana Greca, MD, MMedSc
Hello,
It is understandable to worry after having gestational diabetes before. Pregnancy hormones naturally make the body more resistant to insulin, and this effect usually becomes stronger as pregnancy progresses. You cannot control every risk factor, but early planning and monitoring can make a meaningful difference.
Make sure your obstetrician knows about your previous gestational diabetes. Your care team may test early for previously unrecognized prediabetes or type 2 diabetes rather than waiting for routine pregnancy screening.
If early results are normal, you may still need standard gestational diabetes screening at 24–28 weeks because insulin resistance often increases later in pregnancy. The correct test and timing should be decided by your prenatal care team. You can learn more about the tests commonly used on our blood tests for diabetes page.
You do not need to remove all carbohydrates. The aim is to reduce large glucose rises while providing enough nutrition for you and your baby.
A dietitian experienced in pregnancy can personalize carbohydrate portions and meal timing. Our guide to carbohydrates and the glycemic index provides general background but does not replace a pregnancy meal plan.
Regular moderate activity may improve insulin sensitivity and lower the chance of gestational diabetes in some women. Walking, prenatal exercise, or a short walk after meals may be suitable when your obstetrician approves them.
Stop exercising and contact your maternity team for bleeding, fluid leakage, painful contractions, chest pain, severe shortness of breath, dizziness, or reduced baby movement.
If you were above your healthiest weight before pregnancy, weight management before conception may reduce risk. Once you are pregnant, however, the goal is usually appropriate weight gain based on your starting BMI and your obstetrician's advice—not weight loss.
Skipping meals or eating too little may lead to poor nutrition, dehydration, or ketones. Do not follow a weight-loss plan during pregnancy unless your medical team specifically directs and supervises it.
Your doctor may recommend home glucose monitoring because of your history, but it does not replace laboratory pregnancy screening. Ask when to check, which pregnancy-specific targets apply to you, and when to report results.
Record the time, whether the reading was fasting or after a meal, what you ate, activity, and any symptoms. Understanding blood sugar levels after eating can help, but your pregnancy targets must come from your maternity or diabetes team.
A repeat diagnosis does not mean that you failed. Some women develop gestational diabetes despite healthy eating and regular activity because placental hormones create strong insulin resistance.
Follow the monitoring and treatment plan recommended by your team. Some women can manage their glucose with nutrition and activity, while others need medicine or insulin. Do not delay or refuse treatment because you hoped to control it without medication.
Gestational diabetes often improves after delivery, but it increases the long-term risk of type 2 diabetes. Ask for glucose testing within 4–12 weeks after birth and continued screening in the future, even when the postpartum result is normal.
Contact your maternity or diabetes team promptly for repeated readings above your pregnancy target, vomiting, dehydration, ketones, severe thirst, frequent urination, blurred vision, weight loss, illness, or difficulty keeping food and fluids down. Seek urgent care for severe weakness, confusion, difficulty breathing, bleeding, painful contractions, fluid leakage, or reduced baby movement.
You may not be able to prevent gestational diabetes completely, but you can improve safety by beginning prenatal care early, completing all recommended glucose tests, choosing balanced meals, staying active when safe, and following your personalized monitoring plan.
Educational safety note: This answer is for general education only and does not replace prenatal medical care. Do not begin supplements, strict diets, weight-loss plans, exercise programs, glucose-testing schedules, or medication changes during pregnancy without guidance from your obstetrician or diabetes care team.
Last reviewed: July 2026.
Click here to post comments or follow up
Ask the Doctor now? Simply click here to return to Controlling Gestational Diabetes.