The glucose challenge test, also called the one-hour glucose tolerance test, measures your body's response to sugar (glucose). The glucose challenge test is done during pregnancy to check for gestational diabetes - diabetes that develops during pregnancy.
The test is carried out in two steps. First, drink a sugary solution. Your blood sugar level will be measured an hour later. The results will indicate whether you may have gestational diabetes.
If the test results are outside of the standard range, you may need to perform additional tests to help establish the diagnosis.
The glucose challenge test is used to screen for gestational diabetes during pregnancy.
If you are at average risk of gestational diabetes, you will likely be screened during your second trimester - between the 24th and 28th week of pregnancy.
If you're at high risk of gestational diabetes, your doctor may recommend screening for your first antenatal visit. Risk factors can be:
Have or have a body mass index of 30 or higher (obesity). A lack of physical activity. Gestational diabetes in a previous pregnancy. If you have a condition that is linked to the development of diabetes, such as: B. the metabolic syndrome or the polycystic ovarian syndrome.
Diabetes in a blood relative.
Previously given birth to a baby weighing more than 4.1 kilograms.
Race and Ethnicity - Women who are Black, Hispanic, Native American, and Asian Americans are at higher risk of developing gestational diabetes.
Most women with gestational diabetes give birth to healthy babies. Without careful treatment, gestational diabetes can lead to pregnancy complications, such as a serious illness that leads to high blood pressure and other symptoms that can threaten the lives of both mother and child (preeclampsia). Gestational diabetes can also increase the risk of having a baby with excessive birth weight - which can increase the risk of birth injuries or lead to a caesarean section.
The glucose tolerance test can also help diagnose gestational diabetes. The person can take a two-part test.
Glucose screening test: the person will do a non-fasting blood test, then drink a glucose beverage and have another blood test an hour later. If the result is 140 mg / dL, the doctor may recommend a second test, the glucose tolerance test.
Glucose Tolerance Test: The person will take a fasting blood test, then drink a glucose beverage and do more blood tests 1, 2, and maybe 3 hours later.
If blood sugar levels are high and the person has not yet been diagnosed with diabetes, the doctor will likely diagnose gestational diabetes.
Glucose tolerance tests are an important diagnostic tool for detecting diabetes. If the blood sugar level is above 140 mm / dL, this could indicate diabetes.