The glucose tolerance test also known as oral glucose tolerance test or OGTT is used to test the glucose tolerance of your body. It is used to diagnose pre diabetes and is most commonly done to check diabetes that occurs in pregnancy.
This is usually done to identify the abnormalities in the way your body manages the glucose after you have a meal. It is also done to check for Gestational diabetes. Your chances of having gestational diabetes are:
- You were younger than 25 years of age and also were overweight before getting pregnant.
- Have given birth to a baby who weighed more than 4.1 kgs
- Have had gestational diabetes in your previous pregnancy.
How to get prepared?
Before the test you need to eat a balanced diet which contains at least 150 grams of carbohydrate. This should be on per day basis. Take fruits, breads, cereals, grains, rice and starchy vegetables to increase your carbohydrate intake.
Do not drink, smoke and exercise 8 hours before the first sample that will be taken for the test.
Discuss with your doctor about all the medicines that have been prescribed to you previously. This is done because you might be asked not to take certain medicines before.
- A blood sample is taken known as baseline blood test for comparing the other tests. This is the first thing that is done.
- A liquid drink will be given to you to drink to check the glucose tolerance in you. You will have to drink 75 to 100 grams
- At an interval of 2 to 3 hours blood samples will be collected. It can go as early as 30 minutes and as late is 3 hours.
There are risks also which are involved in this test. In some pregnant women, the blood sugar level drops very low when the test is almost done.
Symptoms of low level of sugar are weakness, hunger and sweating.
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