Glucose Tolerance Test in Pregnancy

glucose tolerance test in pregnancy

Role of Glucose Tolerance Test in Pregnancy

The Glucose Tolerance Test is conducted on pregnant women to check if you have Gestational Diabetes. In this condition the body is unable to produce enough insulin to regulate the blood sugar levels in the blood. Gestational Diabetes can cause complications to the baby and thus the pregnancy. It does not have any obvious symptoms which is why it is necessary to test and check.

Between weeks 24 and 28, you will be asked to take a Glucose Screening Test.

Why is glucose tolerance test taken in pregnancy

You will be asked to have a glass of some liquid high in glucose. After an hour blood will be drawn to be tested to see the blood sugar levels. Only if the result of this test is high will you then be asked to take a Glucose Tolerance Test.

How is glucose tolerance test taken?

The test needs you to not eat/ drink anything 8-14hrs before the test (you may have water but you should check with your doctor about having it.) You will then have blood drawn from you to test your sugar levels (fasting.) You will then be given a glass of water with approximately 75gm of glucose. You need to finish it, you may feel nauseated or dizzy but it will pass. Two hours later, blood will be drawn to test the sugar levels.

Glucose tolerance test in pregnancy normal values:

Your treatment will then be based on the results of this test. If it is not very high then diet modifications and exercise should help control the sugar levels. If the results are high than you might have a more elaborate treatment which will include regular testing of blood, medication or even insulin injections.

These are the above normal levels of glucose level in blood

  • For Fasting: The normal level is up until around 80 mg/DL – Anything above 92 mg/dL is considered above normal.
  • 1 Hour:The normal level is up until around 170 mg/D Anything at or above 180 mg/dL is considered above normal.
  • 2 Hour: The normal level is up until about 150. Anything above at or above 153 mg/dL is considered above normal.

You might be asked to take a Glucose Tolerance Test post the baby to check if the sugar levels are normal. It usually does become normal.

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