Diabetes in Pregnancy

Screening for Gestational Diabetes

At 24-28 weeks, your physician, NP or midwife will give you a requisition to go to the lab for an oral glucose tolerance test.  There are 2 methods of screening for gestational diabetes.  Your healthcare provider will discuss with you the two options of testing. The options are as follows:  

1. Two Step Test:  Go to the lab for a 1 hour oral glucose tolerance test.  If your 1 hour test result is higher than 11.1, you have gestational diabetes.  If your result is between 7.8 and 11.0, you will need to go for a 2 hour oral glucose tolerance test.  If you have 1 reading higher than the values in the chart on the right, you have gestational diabetes.

2.  One Step Test:  Go to the lab for a 2 hour oral glucose tolerance test.  If you have 1 reading higher than the values in the chart on the right, you have gestational diabetes.

Diagnosis of GDM during COVID-19

Diagnosis of Gestational Diabetes with 2 Step

Diagnosis of Gestational Diabetes with 1 Step

Managing Gestational Diabetes

• Your physician, NP or midwife will refer you to a Diabetes Education Program to learn how to manage your gestational diabetes.  If you would like to print a referral to take to your physician, NP or midwife  click here
• Eat three meals and 3 snacks a day with one snack being a bedtime snack
• Check your blood sugars 4 times a day, before and after your meals.  (You will receive a meter at your Diabetes Education Program)
• Stay active if possible
• Sometimes you may need to take insulin.  This will help keep your blood sugars in the target range.  Once your baby is born, you will likely no longer need the insulin
• Supplement your nutrition with a multi-vitamin
• Check your urine for ketones as directed to make sure you and your baby are getting enough nourishment

Target Blood Sugars

• Breast-feeding is strongly encouraged
• Between 6 weeks and 6 months, you should have another oral glucose tolerance test.  Because you had gestational diabetes, you are at higher risk for developing Type 2 diabetes outside of pregnancy.
• Return to your pre-pregnancy weight as soon as you can
• If you are planning another pregnancy, start taking 1 mg Folic Acid 3 months before conceiving.
• If you are 10-12 weeks pregnant, contact your Diabetes Education Program or send a self-referral form

If you have Type 1 or 2 Diabetes

If you have Type 1 or Type 2 diabetes, it is very important to have good control of your diabetes prior to getting pregnant, as well as throughout your pregnancy.  High blood sugars put you at risk of many complications including miscarriage, congenital malformations, high blood pressure, premature delivery and large birth weights.  These risks can be prevented if you plan and manage your diabetes well.   

Pre-pregnancy planning (3 to 6 months before conceiving):

• Make an appointment with your Diabetes Specialist and Diabetes Education Program. If you don't have a Diabetes Education Program, please fill in the self-referral form
• Eat healthy regular meals
• Check your blood sugars at least 4 times per day
• Have a retinal eye exam
• Your physician or NP will send you to the lab to check your blood and urine
• Supplement your mealplan with 1 mg Folic Acid
• Stay active
• If you have Type 2 diabetes, and take pills, your health care provider will switch you to insulin (you might remain on Metformin and or glyburide if you are able to control your blood sugars)

Target Blood Sugars

During your pregnancy:

• You will have regular appointments with your diabetes care team
• Check your blood sugars regularly before and after meals, and occasionally through the night, striving for the recommended targets
• Continue to supplement your nutrition with a multi-vitamin containing 0.4 mg to 1 mg Folic Acid
• You may experience increased episodes of low blood sugar. Record them and discuss with your diabetes care team
• Check your urine for ketones as directed to make sure you and your baby are getting enough nourishment

After your pregnancy:

• Continue to check your blood sugars regularly
• If you have Type 1 diabetes, your physician or NP will do a thyroid blood test at 6 to 8 weeks after your baby is born
• Breast-feeding is strongly encouraged
• Continue your multivitamin containing 0.4 mg to 1 mg Folic Acid for 6 to 12 weeks after your baby is born or as long as you breast-feed
• Increase your milk servings if you are breast-feeding
• If you have Type 2 diabetes, your physician or NP will advise you when to stop insulin and re-start your diabetes pills