Pregestational diabetes occurs when you have type 1 or type 2 diabetes before becoming pregnant. Pregestational diabetes has nine classes that depend on your age at diagnosis and certain complications of the disease.

The class of diabetes that you have tells your doctor about the severity of your condition. For example, your diabetes is class C if you developed it between the ages of 10 and 19. Your diabetes is also class C if you’ve had the disease for 10 to 19 years and you have no vascular complications.

Having diabetes when you’re pregnant increases some risks for both you and your baby. If you have diabetes, your pregnancy will need extra monitoring.

The symptoms of diabetes include:

Pregnancy can also cause symptoms such as frequent urination and fatigue. It’s important to monitor your glucose levels closely to help you and your doctor determine the reason for these symptoms.

Your symptoms will have a lot to do with how well-controlled your diabetes is and how your pregnancy is progressing.

The pancreas produces insulin. Insulin helps your body:

  • use glucose and other nutrients from food
  • store fat
  • build up protein

If your body doesn’t produce enough insulin or uses it inefficiently, then your blood glucose levels will be higher than normal and affect how your body functions.

Type 1 diabetes

Type 1 diabetes occurs when your pancreas is unable to produce insulin. It can happen when your immune system mistakenly attacks your pancreas. It can also happen for unknown reasons. Researchers aren’t sure why people develop type 1 diabetes.

You’re more likely to develop type 1 diabetes if you have a family history of the disease. People who have type 1 diabetes usually receive the diagnosis during childhood.

Type 2 diabetes

Type 2 diabetes is more common than type 1 diabetes. It begins with insulin resistance. If you have insulin resistance, then your body doesn’t use insulin properly or it no longer produces enough insulin.

Being overweight or having a family history of the disease increases your risk of getting type 2 diabetes. Having a poor diet and being physically inactive may also increase your risk of getting type 2 diabetes.

Your doctor will perform a series of random and fasting blood tests to help them make a diagnosis. Read more about diabetes tests.

Some women only develop diabetes during pregnancy. This is called gestational diabetes. Doctors screen most pregnant women for diabetes as part of their prenatal care.

Pregestational diabetes is divided into nine classes, while gestational diabetes is divided into two classes.

Classes of pregestational diabetes

The following are classes of pregestational diabetes:

  • The onset of class A diabetes may occur at any age. You can control this class of diabetes by diet alone.
  • Class B diabetes occurs if you developed diabetes after age 20, have had diabetes for less than 10 years, and you have no vascular complications.
  • Class C diabetes occurs if you developed it between the ages of 10 and 19. Diabetes is also class C if you’ve had the disease for 10 to 19 years and you have no vascular complications.
  • Class D diabetes occurs if you develop diabetes before age 10, have had diabetes for more than 20 years, and you have vascular complications.
  • Class F diabetes occurs with nephropathy, a kidney disease.
  • Class R diabetes occurs with retinopathy, an eye disease.
  • Class RF occurs in people who have both nephropathy and retinopathy.
  • Class T diabetes occurs in a woman who’s had a kidney transplant.
  • Class H diabetes occurs with coronary artery disease (CAD) or another heart disease.

Classes of gestational diabetes

If you didn’t have diabetes until you became pregnant, you have gestational diabetes.

Gestational diabetes has two classes. You can control class A1 diabetes through your diet. If you have class A2 diabetes, you need insulin or oral medications to control it.

Gestational diabetes is usually temporary, but it increases your risk of developing type 2 diabetes later in life.

During your pregnancy, you’ll need extra monitoring for diabetes.

It’s likely you’ll see your OB-GYN, endocrinologist, and perhaps a perinatologist. A perinatologist is a maternal-fetal medicine specialist.

A variety of methods are available to monitor and treat pregestational diabetes:

  • The first thing you should do when you become pregnant is go over your medication list with your doctor. Some medications may not be safe to take during pregnancy.
  • You’ll still take insulin, but you may have to adjust the dose during pregnancy.
  • Monitoring your blood glucose levels is a priority. This means taking frequent blood and urine tests.
  • Your doctor will let you know how to adjust your diet and what exercises are best for you and your baby.
  • Your doctor can use ultrasound imaging to assess your baby’s heart rate, movements, and the amount of amniotic fluid.
  • Diabetes can slow down the development of your baby’s lungs. Your doctor can perform an amniocentesis to check your baby’s lung maturity.
  • Your health, your baby’s health, and your baby’s weight will help your doctor determine if you can deliver vaginally or if a cesarean delivery is necessary.
  • Your doctor will continue to monitor your blood glucose levels closely during labor and delivery. Your insulin needs will likely change again after delivery.

Shop for an at-home blood glucose or at-home urine glucose test.

Many women with diabetes carry and deliver healthy babies without serious complications. However, if you have diabetes, you and your baby are at an increased risk of complications. It’s important to be aware of them.

Complications that may affect the mother during pregnancy include:

High glucose levels, especially in the first trimester, can increase the risk of birth defects. Complications that may affect the baby include:

If you have diabetes, monitoring your health will become even more important when you decide to have a baby. The sooner you start planning, the better. Follow the tips below for a healthy pregnancy.

Talk to your doctors

  • See your endocrinologist and your OB-GYN to make sure you’re in good health and your diabetes is under control. Keeping diabetes well-controlled for several months before you get pregnant can decrease risks for you and your baby.
  • Tell your doctor about all of the medications and supplements you’re currently taking. If you’re pregnant, tell them about all of the medications and supplements you’ve taken since becoming pregnant.
  • Folic acid helps fuel healthy growth and development. Ask your doctor if you should take folic acid or other special vitamins.
  • Take prenatal vitamins if your doctor recommends it.
  • Ask your doctor what your specific blood glucose goals should be.
  • See your doctor again right away when you think you’re pregnant. Make sure your doctors communicate with each other.
  • Keep all prenatal appointments.
  • Tell your doctor about any unusual symptoms right away.

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