Glucose Tolerance Test (GTT), is used for the detection of Gestational diabetes. Gestational diabetes is a condition in which women without previous diagnosis of diabetes exhibit high blood glucose levels during pregnancy, especially in the last 3 months. This is caused when the body of a woman does not produce enough insulin required during pregnancy, leading to increased blood sugar levels.
Symptoms of Gestational diabetes
The symptoms of gestational ***diabetes*** are increased thirst and urination, nausea and vomiting, fatigue, bladder and yeast infection and, blurred vision.
Diagnosis of Gestational diabetes
This can be done by performing a simple test called Glucose Tolerance Test (GTT). This test is generally done between 24 to 28 weeks of pregnancy. You are not supposed to eat or drink anything but sips of water before 8 to 14 hours of this test. This test is advised in the early morning hours.
When you arrive at the lab the technician will take a blood sample to test your fasting blood glucose level and then ask you to drink a more concentrated dose of glucose solution. Then your blood is tested every hour for the next three hours.
If two or more of your readings are as below; then you are tested positive for gestational diabetes:-
a) A fasting plasma glucose of more than 105mg/dl
b) A 1 hour glucose level of more than 190mg/dl
c) A 2 hour glucose level of more than 165mg/dl
d) A 3 hour glucose level of more than 145mg/dl.