Gestational Diabetes


For: , ,

Quest Diagnostics Test Code: 19833

Glucose is a small sugar molecule that is used in all the cells in the body as the main energy source in metabolism and cellular functions. The brain and the nervous system can only use glucose and no other sources or molecules for energy, therefore, there needs to be a steady amount of glucose available in the blood for the brain. Testing the blood for glucose in pregnant women is primarily to diagnose gestational diabetes. There are many different ways to test glucose levels. This test measure the glucose after fasting and then having a sample of glucose drink to see how is the body’s response to glucose two hours later.

This test is performed in following conditions such as:

• Diagnosed with diabetes outside of pregnancy
• Gestational diabetes in a previous pregnancy
• High blood glucose level at an antenatal visit
• Family member who had gestational diabetes
• Macrosomic baby

Also Known As: 1 hour OGTT


The test should be performed between weeks 24 and 28 of gestation. The sample for Gestational Diabetes Screen is collected 1 hour after drinking a glucose solution at the lab. Fasting is not required but please ensure to schedule at least 1 hour of time for your collection.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for the Gestational Diabetes Screen is typically 1 business day.