Introduction to Diabetes:

Diabetes mellitus, commonly referred to as diabetes, is a chronic medical condition characterized by elevated levels of blood glucose (sugar). This condition arises when the body is unable to properly utilize or produce insulin, a hormone that regulates blood sugar. Insulin is essential for the body’s ability to convert glucose from food into energy.

There are three main types of diabetes:

  1. Type 1 Diabetes: This form of diabetes occurs when the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, people with Type 1 diabetes are unable to produce insulin. This type is often diagnosed in children and young adults, and people with Type 1 diabetes require lifelong insulin therapy.
  2. Type 2 Diabetes: This is the most common form of diabetes, accounting for the majority of cases worldwide. In Type 2 diabetes, the body either doesn’t produce enough insulin or becomes resistant to the insulin it does produce. This type is often associated with lifestyle factors such as poor diet, lack of physical activity, and obesity. It is more common in adults, but it can also affect children and adolescents.
  3. Gestational Diabetes: This type of diabetes develops during pregnancy and usually resolves after childbirth. However, women who have had gestational diabetes have an increased risk of developing Type 2 diabetes later in life.

Common symptoms of diabetes include increased thirst, frequent urination, unexplained weight loss, fatigue, and blurred vision. If left untreated, diabetes can lead to serious complications such as heart disease, stroke, kidney damage, nerve damage, and eye problems.

What Is Gestational Diabetes?

Gestational diabetes, a form of diabetes emerging specifically during pregnancy in women without pre-existing diabetes, affects 2% to 10% of pregnancies annually in the United States. It significantly influences how cells utilize sugar (glucose), leading to elevated blood sugar levels that can impact both maternal and fetal well-being.

Effectively managing gestational diabetes is important for ensuring a healthy pregnancy and the well-being of the baby. The condition is typically diagnosed for the first time during pregnancy, posing the need for proactive measures to regulate blood sugar levels. Fortunately, expectant mothers can take control by adopting a combination of healthy dietary choices, regular exercise, and, when deemed necessary, prescribed medication. Maintaining optimal blood sugar levels is essential not only for the mother’s health but also to mitigate the risks associated with a challenging childbirth.

The positive aspect is that, in many cases, blood sugar levels return to normal shortly after delivery. However, a history of gestational diabetes increases the likelihood of developing type 2 diabetes later in life. Consequently, people with a history of gestational diabetes should undergo regular testing for changes in blood sugar levels to promptly identify and address potential developments. This proactive approach to monitoring and managing post-pregnancy health can significantly reduce the risk of long-term complications and ensure a healthier future.

How Gestational Diabetes Can Affect Your Pregnancy?

Many women experiencing gestational diabetes typically undergo otherwise uneventful pregnancies, resulting in the delivery of healthy babies. Nonetheless, gestational diabetes introduces potential complications, including:

  1. Fetal Overgrowth:
    • The condition may lead to the baby growing larger than average, increasing the risk of delivery challenges. This can elevate the likelihood of requiring induced labor or a cesarean section.
  2. Polyhydramnios:
    • Gestational diabetes can contribute to excessive amniotic fluid surrounding the baby in the womb. This condition, known as polyhydramnios, may result in premature labor or delivery-related issues.
  3. Premature Birth:
    • There is an elevated risk of delivering the baby before the completion of the 37th week of pregnancy, which is considered premature.
  4. Pre-eclampsia:
    • Gestational diabetes raises the potential for pre-eclampsia, a condition characterized by heightened blood pressure during pregnancy. If left untreated, pre-eclampsia can lead to complications in pregnancy.
  5. Neonatal Complications:
    • Babies born to mothers with gestational diabetes may experience low blood sugar or jaundice shortly after birth, requiring hospital treatment.
  6. Rare but Serious Risks:
    • While uncommon, there is a risk of stillbirth (loss of the baby) associated with gestational diabetes.

Furthermore, the implications extend beyond pregnancy, as gestational diabetes elevates the risk of developing type 2 diabetes in the future. It is crucial for expectant mothers with gestational diabetes to undergo comprehensive monitoring and adopt appropriate management strategies, including lifestyle adjustments and potential medical interventions, to optimize the health outcomes for both the mother and the baby.

Gestational Diabetes Symptoms

Gestational diabetes is a type of diabetes that occurs during pregnancy. It usually develops in the second or third trimester and is characterized by high blood sugar levels. Many women with gestational diabetes may not experience noticeable symptoms, which is why screening for the condition is a routine part of prenatal care. However, some women may exhibit symptoms similar to those of other types of diabetes. These symptoms may include:

  1. Increased Thirst (Polydipsia): Feeling unusually thirsty and needing to drink more fluids than usual.
  2. Frequent Urination (Polyuria): Needing to urinate more frequently than usual.
  3. Fatigue: Feeling more tired or fatigued than usual.
  4. Blurred Vision: Experiencing blurred vision or other changes in eyesight.
  5. Increased Hunger (Polyphagia): Feeling hungrier than usual, even after eating.

It’s important to note that these symptoms can be common during pregnancy for various reasons, and their presence does not necessarily indicate gestational diabetes. Many cases of gestational diabetes are asymptomatic, so screening tests are crucial for diagnosis.

What Causes Gestational Diabetes?

  1. Hormonal Changes During Pregnancy: During pregnancy, hormonal levels in a woman’s body undergo significant changes. These hormonal fluctuations can affect the normal functioning of insulin, making it harder for the body to process blood sugar efficiently.
  2. Insulin Resistance: Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels. During pregnancy, the body becomes more resistant to the effects of insulin, a condition known as insulin resistance. This means that the body’s cells are less responsive to the insulin produced, requiring higher levels of insulin to maintain normal blood sugar levels.
  3. Increased Need for Insulin: The natural physiological changes that occur during pregnancy, such as weight gain and hormonal fluctuations, result in an increased demand for insulin. Some women may start pregnancy with existing insulin resistance, further contributing to an elevated need for insulin.
  4. Excess Weight Before Pregnancy: Pre-pregnancy weight plays a role in the development of gestational diabetes. Women who enter pregnancy with excess weight are more likely to develop gestational diabetes. This suggests that pre-existing metabolic conditions related to weight may contribute to the insulin resistance observed during pregnancy.

These factors contribute to the development of gestational diabetes, however, the exact reasons why some women develop the condition and others do not are not fully understood. Additionally, genetics and other factors may also play a role in an individual’s susceptibility to gestational diabetes. Regular prenatal care, including screening for gestational diabetes, is important to monitor and manage blood sugar levels during pregnancy.

Gestational Diabetes Risk Factors:

Several factors increase the likelihood of developing diabetes during pregnancy. It’s important to note that having one or more of these risk factors does not guarantee that a woman will develop the condition, and conversely, some women without these risk factors may still experience it. The risk factors include:

  1. Age: Women over 40 are at a higher risk of developing diabetes during pregnancy. The risk increases with age.
  2. Family History: Having a close relative, such as a parent or sibling, with diabetes increases the risk.
  3. Ethnicity: Women from certain ethnic groups, including African-American, Hispanic, Native American, Asian, or Pacific Islander, face an elevated risk.
  4. Obesity or Overweight: Excess body weight, especially before pregnancy, is a significant risk factor. Women with a body mass index (BMI) of 30 or higher are at an increased risk.
  5. Previous Occurrence: Women who experienced diabetes during a previous pregnancy are more likely to have it again in subsequent pregnancies.
  6. Polycystic Ovary Syndrome (PCOS): Women with PCOS, a hormonal disorder affecting the menstrual cycle and fertility, have an increased risk.
  7. Previous Large Baby: Women who delivered a baby weighing 9 pounds (4,082 grams) or more in a previous pregnancy are at a higher risk.
  8. Pre-existing Health Conditions: Conditions such as prediabetes or insulin resistance before pregnancy can increase the risk.
  9. Hypertension (High Blood Pressure): Women with hypertension have an elevated risk.
  10. Sedentary Lifestyle: Lack of physical activity and a sedentary lifestyle can contribute to the development of diabetes during pregnancy.


If you are at average risk of gestational diabetes, a routine screening test is typically conducted during the second trimester, between 24 and 28 weeks of pregnancy. This involves an initial glucose challenge test, where you drink a glucose solution, and your blood sugar level is measured one hour later. A blood sugar level of 190 milligrams per deciliter (mg/dL) or 10.6 millimoles per liter (mmol/L) indicates gestational diabetes.

For those at high risk of diabetes, such as being overweight or obese before pregnancy, having a family history of diabetes, or having had gestational diabetes in a previous pregnancy, testing may occur earlier, likely at the first prenatal visit.

The screening process involves an initial glucose challenge test, with a blood sugar level below 140 mg/dL (7.8 mmol/L) usually considered within the standard range. If the initial test indicates a higher-than-expected blood sugar level, a follow-up glucose tolerance test is performed. This test involves consuming a solution with even more sugar, and blood sugar is checked every hour for three hours. If at least two of the blood sugar readings during this test are higher than expected, a diagnosis of gestational diabetes is made.

Gestational Diabetes Treatments:

Gestational diabetes, a form of diabetes that develops during pregnancy, requires careful management to ensure the well-being of both the mother and the baby. Controlling blood sugar levels is crucial in minimizing potential complications. Treatment strategies encompass lifestyle modifications, regular monitoring, and, if necessary, medication. It is important for people with gestational diabetes to actively engage with their medical team to tailor a comprehensive plan that aligns with their specific needs. Let’s explore the key components of gestational diabetes treatment:

Lifestyle Changes:

  • Follow a healthy diet that focuses on fruits, vegetables, whole grains, and lean protein.
  • Limit highly refined carbohydrates and sweets.
  • Consult with a registered dietitian or certified diabetes care and education specialist to create a personalized meal plan.
  • Stay physically active with the approval of your health care provider.
  • Aim for 30 minutes of moderate exercise most days of the week, incorporating activities like walking, cycling, swimming, housework, and gardening.

Blood Sugar Monitoring:

  • Check blood sugar levels four or more times a day, including fasting levels and after meals.
  • Regular monitoring helps ensure that blood sugar levels stay within a healthy range.


  • If lifestyle changes alone are insufficient, medication may be required.
  • Insulin injections are a common option to lower blood sugar levels.
  • Some healthcare providers may also prescribe oral medications, though opinions on their safety and effectiveness may vary.

Close Monitoring of Baby:

  • Regular observation of your baby’s growth and development through ultrasounds and other tests.
  • Induction of labor may be recommended if you do not go into labor by 41 weeks or earlier if there are concerns about your or your baby’s health.

Follow-Up After Delivery:

  • Blood sugar levels are checked after delivery and again 6 to 12 weeks postpartum to ensure they have returned to the standard range.
  • Regular follow-ups to assess diabetes risk at least every three years.
  • If there are indications of type 2 diabetes or prediabetes, discuss with your healthcare provider for appropriate prevention or management strategies.

How To Prevent Gestational Diabetes?

Before getting pregnant, it’s hard to promise you won’t have gestational diabetes, but doing healthy things can help a lot. If you had it before, these good choices might also lower the chance of having it again or getting type 2 diabetes later. Eat well by choosing foods with lots of fiber and not too much fat or calories. Focus on fruits, veggies, and whole grains. Try different foods to stay healthy without giving up taste. Be careful about how much you eat.

Stay active. Doing exercises before and during pregnancy can help stop gestational diabetes. Try to do 30 minutes of moderate activity most days. Go for a brisk walk, ride your bike, or swim. Even small things like parking far from the store or taking short walks help. Start pregnancy at a good weight. If you want to get pregnant, losing extra weight can make your pregnancy healthier. Make lasting changes to what you eat, like having more veggies and fruits. Don’t gain too much weight. It’s normal and good to gain some weight during pregnancy, but gaining too much too fast can make gestational diabetes more likely. Ask your doctor how much weight is okay for you.

Gestational Diabetes Effects On Baby:

Gestational diabetes can impact the baby in various ways:

  1. Increased Birth Weight: Babies born to mothers with this condition may be larger than usual, potentially leading to more complicated deliveries.
  2. Low Blood Sugar Levels: After birth, the baby might experience low blood sugar levels, as their system adjusts from the higher levels in the mother.
  3. Higher Risk of Jaundice: There’s an elevated chance of the baby developing jaundice, a condition characterized by yellowing of the skin and eyes.
  4. Respiratory Distress: Babies from mothers with gestational diabetes may face challenges in breathing, increasing the risk of respiratory distress syndrome.
  5. Potential for Future Health Issues: These infants may have an increased likelihood of developing obesity and type 2 diabetes as they grow older.

Managing gestational diabetes during pregnancy, with the guidance of doctors, is important to minimizing these potential effects on the baby’s health.

Planning Future Pregnancies:

If you had gestational diabetes before and plan to have a baby, it’s important to check for diabetes. Your doctor (GP) can help with this. If you do have diabetes, your GP may send you to a special clinic before pregnancy to make sure your condition is well managed. However, if your pregnancy is a surprise, talk to your GP and let them know you had gestational diabetes before. If tests show you don’t have diabetes, they will check your sugar levels early in pregnancy (after your first midwife appointment) and again at 24 to 28 weeks if the first test is normal.

Alternatively, your midwife or doctor might suggest checking your sugar levels yourself using a small device that pricks your finger, similar to what you did during your previous gestational diabetes. This helps keep an eye on things and ensures a healthy pregnancy.

ICD 10 Gestational Diabetes:

The ICD-10 code for gestational diabetes is O24.4. In the International Classification of Diseases, 10th Revision (ICD-10), this code is specifically designated for gestational diabetes mellitus. It’s a system used by doctors for medical coding and billing purposes, helping standardize the reporting of various health conditions, including gestational diabetes.

Departments that treat this condition

  • Endocrinology
  • Obstetrics and Gynecology
  • Obstetrics in Minnesota

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