Glucose Challenge Test(75 G)

GLUCOSE CHALLENGE TEST(75 G) Test Purpose

The Glucose Challenge Test (75 g), also known as a 75 g Oral Glucose Tolerance Test (OGTT), evaluates how the body processes glucose after consuming a measured glucose solution. It is commonly used during pregnancy to screen for or diagnose gestational diabetes mellitus (GDM).

In India, the DIPSI approach uses a 75 g oral glucose load and measures plasma glucose 2 hours after consumption. Under this approach, the glucose solution may be given irrespective of whether the woman is fasting or non-fasting.

Other protocols, including the commonly used one-step 75 g OGTT, involve an overnight fast, followed by blood glucose measurements at fasting, 1 hour, and 2 hours after the glucose drink. Therefore, the exact procedure and interpretation can vary according to the protocol prescribed by the healthcare provider or laboratory.

The test is particularly important during pregnancy because gestational diabetes can increase health risks for both the mother and baby if it is not identified and managed appropriately.

GLUCOSE CHALLENGE TEST(75 G) Test is for Individuals:

• Pregnant women undergoing gestational diabetes screening
• Women generally being evaluated during the 24–28 week period of pregnancy
• Pregnant women with risk factors for gestational diabetes who may require earlier testing
• Women with a previous history of gestational diabetes
• Pregnant individuals with a family history of diabetes
• Women who are overweight or have other recognized risk factors for diabetes
• Pregnant women with an abnormal preliminary blood glucose result
• Individuals whose obstetrician or healthcare provider recommends a 75 g glucose tolerance test

FAQs

1. What is the 75 g Glucose Challenge Test used for?
It is primarily used to evaluate how the body handles glucose and to identify gestational diabetes during pregnancy. Depending on the protocol, it may function as a screening or diagnostic test.

2. Do I need to fast before a 75 g Glucose Test?
Preparation depends on the testing protocol. The DIPSI 75 g procedure used in India can be performed without fasting, whereas a standard 75 g OGTT may require an overnight fast. Follow the specific instructions provided by your doctor or laboratory.

3. When is the 75 g glucose test usually performed during pregnancy?
Gestational diabetes testing is commonly performed around 24–28 weeks of pregnancy. Women at higher risk may be tested earlier and may require repeat testing later if the initial result is normal.