Gestational Diabetes Blood Test

During pregnancy, some women develop gestational diabetes, a temporary form of hyperglycemia (increased levels of glucose in the blood). If left undetected and uncontrolled, the condition can result in the fetus increasing in size and weight. Low glucose levels and breathing difficulties at birth can also result. It is common practice to screen for gestational diabetes between the 24th and 28th week of pregnancy.

In this one-hour Glucose Challenge Test recommended by the American Congress of Obstetricians and Gynecologists, the patient will be given a glucose solution to drink. After an hour, a blood sample is drawn and tested to measure blood glucose levels. If levels are increased, a 100-gram three-hour oral glucose tolerance test (OGTT) may be recommended to confirm diagnosis of gestational diabetes.

Fasting is not required prior to the Glucose Challenge Test, and results will be available within one to two days. This test is a convenient, low-cost alternative to testing at a doctor's office.