An oral glucose tolerance test (OGTT) is one of several tests that check for gestational diabetes. You may have already had a different glucose screening test (for example, a glucose challenge test).
For the OGTT, you will prepare ahead of time by not eating before the test.
Gestational diabetes is a form of diabetes that can develop when you are pregnant. An OGTT measures your body's ability to use a type of sugar, called glucose, that is your body's main source of energy. If your blood sugar level first becomes too high when you are pregnant, you might have gestational diabetes. The condition usually goes away after the baby is born.
When you have gestational diabetes, a hormone called insulin is not able to keep your blood sugar in a normal range. This condition may not cause symptoms. That's why it's important for you to be tested for it. Most women are screened for gestational diabetes between the 24th and 28th weeks of pregnancy.
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, which can cause seizures. But if you find out you have gestational diabetes, you can treat it with medicine and lifestyle changes. With treatment, most women are able to control their blood sugar and give birth to healthy babies.
If you have gestational diabetes:
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
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Current as of: July 25, 2018
Elizabeth T. Russo, MD - Internal Medicine & Rebecca Sue Uranga, MD - Obstetrics and Gynecology
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