If your blood sugar level first becomes too high when you are pregnant, you have gestational diabetes. It usually goes back to normal after the baby is born.
High blood sugar can cause problems for you and your baby. Your baby may grow too large, which can cause problems during delivery. Your baby may also be born with low blood sugar. But with treatment, most women who have gestational diabetes are able to control their blood sugar and give birth to healthy babies.
Women who have had gestational diabetes are more likely than other women to develop type 2 diabetes later on. You may be able to prevent or reduce the severity of type 2 diabetes by staying at a healthy weight, eating healthy foods, and increasing your physical activity.
The pancreas makes a hormone called insulin. Insulin helps your body properly use and store the sugar from the food you eat. This keeps your blood sugar level in a target range. When you are pregnant, the placenta makes hormones that can make it harder for insulin to work. This is called insulin resistance.
A pregnant woman can get diabetes when her pancreas cannot make enough insulin to keep her blood sugar levels within a target range.
Because gestational diabetes may not cause symptoms, you need to be tested for the condition. You may be surprised if your test shows a high blood sugar. It is important for you to be tested for gestational diabetes, because high blood sugar can cause problems for both you and your baby.
Sometimes a pregnant woman who has symptoms has been living with another type of diabetes without knowing it. If you have symptoms from another type of diabetes, they may include:
Pregnancy causes most women to urinate more often and to feel more hungry. So having these symptoms does not always mean that a woman has diabetes. Talk with your doctor if you have these symptoms, so that you can be tested for diabetes at any time during pregnancy.
The Canadian Diabetes Association recommends that all women who are not already diagnosed with diabetes be tested for gestational diabetes between the 24th and 28th weeks of pregnancy.2
Some women with gestational diabetes can control their blood sugar level by changing the way they eat and by exercising regularly. These healthy choices can also help prevent gestational diabetes in future pregnancies and type 2 diabetes later in life.
Treatment for gestational diabetes also includes checking your blood sugar level at home and seeing your doctor regularly.
You may need to give yourself insulin shots to help control your blood sugar. This insulin adds to the insulin that your body makes.
Oral medicines called metformin and glyburide may be used to control gestational diabetes in some women.
Health Tools help you make wise health decisions or take action to improve your health.
|Decision Points focus on key medical care decisions that are important to many health problems.|
|Breast-Feeding: Should I Breast-Feed My Baby?|
|Actionsets are designed to help people take an active role in managing a health condition.|
|Breast-Feeding: Planning Ahead|
|Diabetes: Giving Yourself an Insulin Shot|
|Gestational Diabetes: Checking Your Blood Sugar|
|Gestational Diabetes: Counting Carbs|
|Gestational Diabetes: Dealing With Low Blood Sugar|
|Gestational Diabetes: Giving Yourself Insulin Shots|
Learning about gestational diabetes:
Living with gestational diabetes:
During pregnancy, an organ called the placenta develops in the uterus. The placenta connects the mother and baby and makes sure the baby has enough food and water. It also makes several hormones. Some of these hormones make it hard for insulin to do its job—controlling blood sugar—so the mother's body has to make more insulin to keep sugar levels in a safe range. Gestational diabetes develops when the organ that makes insulin, the pancreas, cannot make enough insulin to keep blood sugar levels within a target range.
Because gestational diabetes does not cause symptoms, you need to be tested for the condition. This is usually done between the 24th and 28th weeks of pregnancy. You may be surprised if your test shows a high blood sugar. It is important for you to be tested for gestational diabetes, because high blood sugar can cause problems for both you and your baby.
Sometimes, a pregnant woman has been living with diabetes without knowing it. If you have symptoms from diabetes, they may include:
Pregnancy causes most women to urinate more often and to feel more hungry, so having these symptoms does not always mean that a woman has diabetes. Talk with your doctor if you have these symptoms, so that you can be tested for diabetes.
Most women find out they have gestational diabetes after being tested between the 24th and 28th weeks of their pregnancy. After you know you have gestational diabetes, you will need to make certain changes in the way you eat and how often you exercise to help keep your blood sugar level within a target range. As you get farther along in your pregnancy, your body will continue to make more and more hormones. This can make it harder and harder to control your blood sugar. If it is not possible to control your blood sugar with food and exercise, you may also need to give yourself shots of insulin. Oral medicines called metformin and glyburide may be used to control gestational diabetes in some women.
Just because you have diabetes does not mean that your baby will have diabetes. Most women who have gestational diabetes give birth to healthy babies. If you are able to keep your blood sugar level within a target range, your chances of having problems during pregnancy or birth are the same as if you didn't have gestational diabetes.
Sometimes a mother or her baby has problems because of high blood sugar. These problems include:
Most of the time, gestational diabetes goes away after a baby is born. But if you have had gestational diabetes, you have a greater chance of having it in a future pregnancy and of developing type 2 diabetes. Up to 30 out of 100 women who develop gestational diabetes will develop diabetes within 15 years.1
Each year, up to 20 out of 100 pregnant women in Canada will develop gestational diabetes.1
You have an increased chance of developing gestational diabetes if:2
Call 911 or other emergency services right away if:
Call a doctor if:
Check with your doctor if:
After you are diagnosed with gestational diabetes, you may be referred to other health professionals who can help you understand what gestational diabetes means. These may include:
Experts debate whether all pregnant women need to be tested for gestational diabetes. But most doctors routinely test all pregnant women who are in their care. The Canadian Diabetes Association recommends that all women who are not already diagnosed with diabetes be tested for gestational diabetes between the 24th and 28th weeks of pregnancy.2
If you have gestational diabetes, your doctor will check your blood pressure at every visit. You will also have certain tests throughout your pregnancy to check your and your baby's health. These tests include:
Some doctors may recommend you have a hemoglobin A1c (glycosylated hemoglobin) or a similar test every month during your pregnancy. The A1c test estimates your average blood sugar level over the previous weeks to months.
During labour and delivery, you and your baby will be monitored very closely.
After your baby is born, your blood sugar level will be checked several times. Your baby's blood sugar level will also be checked several times within the first few hours after birth.
Even though your gestational diabetes will probably go away after your baby is born, you are at risk for gestational diabetes again and for type 2 diabetes later in life. Up to 30 out of 100 women who develop gestational diabetes will develop diabetes within 15 years.1
You will have a follow-up glucose tolerance test 6 weeks to 6 months after your baby is born.2 If the results of this test are normal, you will still need to be tested for type 2 diabetes at least every 3 years. Even if your sugar level is normal, you are at increased risk of developing diabetes in the future. Eating healthy foods and getting regular exercise can help prevent type 2 diabetes.
If you want to get pregnant again, you should be tested for diabetes both before you become pregnant and early in your pregnancy.
Finding out that you have gestational diabetes can be scary. It can be reassuring to know that most women who have gestational diabetes give birth to healthy babies and that you are the most important person in promoting a healthy pregnancy.
Treatment for gestational diabetes involves making healthy choices. Most women who make changes in the way that they eat and how often they exercise are able to keep their blood sugar level within a target range. Controlling your blood sugar is the key to preventing problems during pregnancy or birth.
You, your doctor, and other health professionals will work together to develop a treatment plan just for you. You do not need to eat strange or special foods. But you may need to change what, when, and how much you eat. You also do not need to start a fancy exercise program or join an expensive gym. Walking several times a week can really help your blood sugar.
The lifestyle changes you make now will help you have a healthy pregnancy and prevent diabetes in the future. As you start making these changes, you will learn more about your body and how it reacts to food and exercise. You may also notice that you feel better and have more energy.
Treatment for gestational diabetes during pregnancy includes:
Most doctors will recommend that you breast-feed, if possible, for the health benefits for you and your baby. For example, breast-feeding can help keep your child at a healthy weight, which may reduce his or her chances of developing diabetes. It provides antibodies to strengthen your baby's immune system, and it lowers your baby's risk for many types of infections. And it may lower your chances of developing diabetes later in life.
Most women who have gestational diabetes are able to have their babies vaginally. Just because you have gestational diabetes does not mean that you will need to have a caesarean section (C-section).
Because a baby that has grown too large can be difficult to deliver safely, your doctor will do fetal ultrasounds to check the size of your baby. If your doctor thinks that your baby is in danger of being too large, he or she may decide to induce labour or do a C-section.
During labour and delivery, you and your baby are monitored closely. This includes:
After delivery, you and your baby still need to be monitored closely.
Most of the time, the blood sugar levels of women who have gestational diabetes return to normal in a few hours or days after delivery.
If you have had gestational diabetes, you are at risk for having it again in a future pregnancy. You are also at risk of type 2 diabetes, a permanent type of diabetes. The healthy choices and changes you made during your pregnancy, if continued, will help you prevent diabetes in the future. If you are worried about type 2 diabetes in yourself or in your child, talk to your doctor about your concerns.
In some women, gestational diabetes cannot be prevented. But you may be able to lower your chance of getting gestational diabetes by staying at a healthy weight and not gaining too much weight during pregnancy. Regular exercise can also help keep your blood sugar level within a target range and prevent gestational diabetes.
If you have had gestational diabetes, you are at risk for having it again in a future pregnancy. You are also at risk for type 2 diabetes, a permanent type of diabetes. One of the best ways to prevent developing gestational diabetes again is to stay at a healthy weight.
If you have had gestational diabetes, avoid medicines that increase insulin resistance, such as nicotinic acid and glucocorticoid medicines (for example, prednisone and dexamethasone).
You are the most important person in determining whether you will have a healthy pregnancy. Gestational diabetes, like any form of diabetes, cannot be successfully treated with medicines alone.
Your doctor, diabetes educator, registered dietitian, and other health professionals can help you learn how to care for yourself and protect your baby from problems. If you learn as much as you can about gestational diabetes, you will have the knowledge you need to have a healthy pregnancy. As you understand how food and exercise affect your blood sugar, you can better control your blood sugar level and help prevent problems from gestational diabetes.
Home treatment for gestational diabetes includes changing the way you eat, exercising regularly, and checking your blood sugar.
Changing what, when, and how much you eat can help keep your blood sugar level in a target range. After you are diagnosed with gestational diabetes, you will meet with a registered dietitian to decide on an individualized healthy eating plan. Your dietitian may ask you to write down everything you eat and to keep track of your weight. He or she will also teach you how to count carbohydrate in order to spread carbohydrate throughout the day. For more information, see:
If you have never exercised regularly or were not exercising before you became pregnant, talk with your doctor before you start exercising. Exercise that does not place too much stress on your lower body—such as using an arm ergometer, a machine that just works your arm muscles; or riding a recumbent bicycle, a type of bike with a seat that looks like a chair—are especially good for pregnant women. You may also want to try special exercise classes for pregnant women or other low-impact activities such as swimming or walking.
If exercise and changing the way you eat keep your blood sugar within a target range, you will not need to take diabetes medicine. If you need to take insulin, make sure you have a quick-sugar food, such as 3 to 4 glucose tablets or 3 pieces of hard candy, with you when you exercise in case you have symptoms of low blood sugar. Symptoms of low blood sugar include sweating, blurred vision, and confusion. If you think that your blood sugar is low, stop exercising, check your blood sugar level, and eat the snack.
An important part of treating gestational diabetes is checking your blood sugar level at home. Every day, you will do a home blood sugar test one or more times. It may be overwhelming to test your blood sugar so often. But knowing that your level is within a target range can help put your mind at ease. Talk to your doctor about how often to test your blood sugar.
Most women can treat gestational diabetes by changing the way they eat and exercising more often. If these changes do not keep your blood sugar level within a target range, you may need to take insulin. You may also need to take insulin if your doctor thinks that your baby is getting too large.
If you need to take insulin, your doctor will teach you how to give yourself an insulin shot.
Insulin is the primary medicine used to treat gestational diabetes. Insulin is only used if you cannot control your blood sugar level by eating well and exercising regularly.
How much insulin you need depends on how much you weigh and on how close you are to your due date. Some women need more insulin as they get closer to their delivery date, because the placenta makes more and more hormones that make it harder and harder for insulin to do its job. In rare cases, a woman with gestational diabetes has to stay in the hospital for a short time to get her blood sugar level within a target range.
All pregnant women need to take prenatal vitamins. If you want to take other types of vitamins, talk with your doctor. Do not take more of any vitamin than would be found in the approved prenatal vitamins.
|Society of Obstetricians and Gynaecologists of Canada (SOGC)|
|780 Echo Drive|
|Ottawa, ON K1S 5R7|
The mission of SOGC is to promote optimal women's health through leadership, collaboration, education, research, and advocacy in the practice of obstetrics and gynaecology.
|Canadian Diabetes Association|
|1400-522 University Avenue|
|Toronto, ON M5G 2R5|
The Canadian Diabetes Association (CDA) is devoted to meeting the needs of people with diabetes in Canada. This organization provides general information about diabetes and its care. It organizes summer camps for young people with diabetes and conducts educational seminars to help people manage their diabetes. The CDA also sells a range of products, including cookbooks, in its stores.
|Dietitians of Canada|
|480 University Avenue|
|Toronto, ON M5G 1V2|
The Dietitians of Canada website provides a wide range of food and nutrition information, including fact sheets on frequently asked food and diet questions, quizzes and other tools to assess your diet habits, and meal planning guides.
|National Aboriginal Diabetes Association (NADA)|
|B1-90 Garry Street|
|Winnipeg, MB R3C 4J4|
The mission of the National Aboriginal Diabetes Association (NADA) is to address diabetes among Aboriginal peoples as a priority health issue. It supports individuals, families, and communities to access resources for diabetes prevention, education, and research in culturally respectful ways; partners with organizations committed to the prevention and management of diabetes; and promotes community wellness as a strategy to prevent diabetes.
- Canadian Diabetes Association (2011). Testing for type 2 diabetes after gestational diabetes mellitus (GDM). Available online: http://www.diabetes.ca/diabetes-and-you/healthy-guidelines/protecting-mothers/.
- Canadian Diabetes Association Clinical Practice Guidelines Expert Committee (2013). Diabetes and pregnancy section of Canadian Diabetes Association 2013 clinical practice guidelines for the prevention and management of diabetes in Canada. Canadian Journal of Diabetes, 37(Suppl 1): S168–S183. Also available online: http://guidelines.diabetes.ca.
Other Works Consulted
- American Diabetes Association (2008). Nutrition recommendations and interventions for diabetes. Diabetes Care, 31(Suppl 1): S61–S78.
- Buchanan TA, et al. (2007). What is gestational diabetes? Diabetes Care, 30(Suppl 2): S105–S111.
- Canadian Diabetes Association Clinical Practice Guidelines Expert Committee (2013). Canadian Diabetes Association 2013 clinical practice guidelines for the prevention and management of diabetes in Canada. Canadian Journal of Diabetes, 37(Suppl 1). Also available online: http://guidelines.diabetes.ca.
- Conway DL (2007). Obstetric management in gestational diabetes. Diabetes Care, 30(Suppl 2): S175–S179.
- Coustan DR (2007). Pharmacological management of gestational diabetes. Diabetes Care, 30(Suppl 2): S206–S208.
- Cunningham FG, et al. (2010). Diabetes. In Williams Obstetrics, 23rd ed., pp. 1104–1125. New York: McGraw-Hill.
- Hod M, Yogev Y (2007). Goals of metabolic management of gestational diabetes. Diabetes Care, 30(Suppl 2): S180–S187.
- Jovanovic L, Pettitt DJ (2007). Treatment with insulin and its analogs in pregnancies complicated by diabetes. Diabetes Care, 30(Suppl 2): S220–S224.
- Kitzmiller JL, et al. (2007). Gestational diabetes after delivery. Diabetes Care, 30(Suppl 2): S225–S235.
- Metzger BE (2007). Summary and recommendations of the fifth international workshop-conference on gestational diabetes mellitus. Diabetes Care, 30(Suppl 2): S251–S260.
- Moore TR (2007). Glyburide for the treatment of gestational diabetes. Diabetes Care, 30(Suppl 2): S209–S213.
- Pettitt DJ, Jovanovic L (2007). Low birth weight as a risk factor for gestational diabetes, diabetes, and impaired glucose tolerance during pregnancy. Diabetes Care, 30(Suppl 2): S147–S149.
- Ratner RE (2007). Prevention of type 2 diabetes in women with previous gestational diabetes. Diabetes Care, 30(Suppl 2): S242–S245.
- Reader DM (2007). Medical nutrition therapy and lifestyle interventions. Diabetes Care, 30(Suppl 2): S188–S193.
|Primary Medical Reviewer||Sarah Marshall, MD - Family Medicine|
|Specialist Medical Reviewer||Rhonda O'Brien, MS, RD, CDE - Certified Diabetes Educator|
|Last Revised||May 24, 2013|
Last Revised: May 24, 2013
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.