Screening for Gestational Diabetes Mellitus (GDM)

Healthcare Provider Tool

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What is the stage of pregnancy?

Early pregnancy / first antenatal visit
24 to 28 weeks

Does the patient have at least one risk factor for diabetes?*

Yes No

*Review Clinical Practice Guidelines' Chapter 4: Screening for Diabetes in Adults — Table 1: Risk factors for type 2 diabetes for more detailed information.

Enter the Fasting Plasma Glucose (FPG) and/or A1C test results:

  mmol/L     %
Submit

Select the appropriate approach:

2 step approach (preferred)
1 step approach (alternative)

Enter the 1hr value test results from the 50g Oral Glucose Tolerance Test (OGTT):

  mmol/LSubmit

Enter the test results from the Measure 75g Oral Glucose Tolerance Test (OGTT):

  mmol/L   mmol/L     mmol/L
Submit

Enter the test results from the Measure 75g Oral Glucose Tolerance Test (OGTT):

  mmol/L   mmol/L     mmol/L
Submit
Calculate Result
Calculate Result

Screen for GDM at 24–28 weeks

Consider as pre-existing diabetes

Re-screen at 24–28 weeks

Normal

GDM

 
 
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*The Canadian Diabetes Association is the registered owner of the name Diabetes Canada. All content on guidelines.diabetes.ca, CPG Apps and in our online store remains exactly the same. For questions, contact communication@diabetes.ca.