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Oral Glucose Tolerance Test The oral glucose tolerance test
(OGTT) measures the body's ability to use a type of sugar,
called glucose, that is the body's main source of energy. An
OGTT can be used to diagnose prediabetes and diabetes. An OGTT
is most commonly done to check for diabetes that occurs with
pregnancy (gestational diabetes). Why It Is Done The oral
glucose tolerance test (OGTT) is done to: - Check pregnant women
for gestational diabetes. have an increased chance of developing
gestational diabetes if you: - Have had gestational diabetes
during a previous pregnancy. - Have previously given birth to a
baby who weighed more than 9 lb (4.1 kg). - Are younger than age
25 and were overweight before getting pregnant. - Diagnose
prediabetes and diabetes. How To Prepare Glucose tolerance
diagnostic test To prepare for the