Glucose challenge test

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What you can expect

By Mayo Clinic staff

The glucose challenge test is done in two steps. When you arrive at your health care provider's office or lab, you'll drink about 8 ounces (237 milliliters) of a syrupy glucose solution that contains 1.8 ounces (50 grams) of sugar. Often, the glucose solution is cola- or orange-flavored. One hour later, a member of your health care team will take a sample of blood by pricking your fingertip or inserting a needle into a vein in your arm. This blood sample will be used to measure your blood sugar level.

After drinking the glucose solution, you'll likely need to remain in the health care provider's office or lab while you're waiting for your blood sugar level to be tested. After the glucose challenge test, you can return to your usual activities immediately.

References
  1. Jovanovic L. Screening and diagnosis of gestational diabetes mellitus. http://www.uptodate.com/home/index.html. Accessed May 3, 2010.
  2. Tan PC, et al. The 50-g glucose challenge test and pregnancy outcome in a multiethnic Asian population at high risk for gestational diabetes. International journal of gynecology and obstetrics. 2009;105:50.
  3. Lamar ME, et al. Jelly beans as an alternative to a fifty-gram glucose beverage for gestational diabetes screening. American Journal of Obstetrics and Gynecology. 1999;181:1154.
  4. Position statement: Standards of medical care in diabetes — 2010. Diabetes Care. 2010;33:S11.
  5. What is gestational diabetes? American Diabetes Association. http://www.diabetes.org/gestational-diabetes.jsp. Accessed May 4, 2010.
MY00146 Aug. 28, 2010

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