Gestational Diabetes: Causes, Symptoms, Complications, and Management

Dr. Maryam Sharif (Board-Certified Clinical Pharmacist)

January 29, 2025

Gestational diabetes is a common condition during pregnancy that can significantly affect both the mother’s and baby’s health.

Introduction

Gestational diabetes usually develops in the second half of pregnancy due to hormonal changes and an increased need for insulin. This article explores the causes, symptoms, complications, and management of gestational diabetes.

Causes of Gestational Diabetes

Several factors can lead to high blood sugar during pregnancy. Here are the main ones:

  1. Hormonal Changes
    During pregnancy, hormones like estrogen and progesterone increase. These hormones can cause insulin resistance, meaning the body needs more insulin to regulate blood sugar. In some cases, the body can’t produce enough insulin, leading to higher blood sugar levels.
  2. Unhealthy Diet
    Eating sugary and processed foods can cause rapid spikes in blood sugar. Foods high in simple sugars, such as sweets, sugary drinks, and white bread, can raise blood sugar levels. Not consuming enough fiber and protein can also negatively impact blood sugar control.
  3. Overweight and Obesity
    Being overweight before pregnancy or gaining too much weight during pregnancy can increase the risk of gestational diabetes. Obesity can cause insulin resistance, making blood sugar harder to control.
  4. Age
    Women over 35 are at a higher risk of developing gestational diabetes, as they are more likely to experience metabolic issues that can elevate blood sugar levels.
  5. Family History
    A family history of diabetes can increase the likelihood of gestational diabetes. If a family member has diabetes, the risk is higher for the individual.
  6. Lack of Physical Activity
    A sedentary lifestyle can contribute to high blood sugar. Regular exercise can improve insulin sensitivity and help regulate blood sugar.

By identifying and managing these factors, pregnant women can reduce the risk of gestational diabetes and its complications. Consulting with a doctor and nutritionist can also be highly beneficial.

Symptoms of Gestational Diabetes

Many women with gestational diabetes experience no symptoms, but some common signs include:

  • Increased thirst
  • Frequent urination
  • Unusual fatigue
  • Nausea and vomiting

Gestational diabetes is typically diagnosed through routine pregnancy tests, especially between weeks 24 and 28.

Complications of Gestational Diabetes

Gestational diabetes can cause complications for both the mother and the baby.

For the Mother:

  • High blood pressure: Women with gestational diabetes are at higher risk for high blood pressure or preeclampsia.
  • Increased likelihood of cesarean section: Due to the baby’s larger size, a cesarean section may be necessary.
  • Higher risk of preterm birth or other complications during labor.

For the Baby:

  • High birth weight: Babies may be born larger than usual because of the elevated blood sugar levels in the mother.
  • Respiratory issues: Newborns may face breathing difficulties.
  • Increased risk of future diabetes: Babies born to mothers with gestational diabetes are at a higher risk of developing type 2 diabetes later in life.
  • Low blood sugar or jaundice: Newborns may experience low blood sugar or develop jaundice.
  • Stillbirth: Though rare, stillbirth is a potential risk.

Gestational Diabetes Screening Tests

Screening for gestational diabetes is done to identify women at risk. These tests usually occur between weeks 24 and 28. In the early stages, a healthcare provider will evaluate the risk factors and decide whether earlier screening is necessary.

Screening includes:

  1. Initial Screening
    The pregnant woman drinks a glucose solution containing 50 grams of glucose. One hour later, her blood sugar is measured. If blood sugar is higher than normal, an oral glucose tolerance test is performed.
  2. Oral Glucose Tolerance Test
    The pregnant woman drinks a glucose solution containing 100 grams of glucose. Blood sugar is measured at 0, 1, 2, and 3 hours. If blood sugar is elevated at least twice above the normal limits, gestational diabetes is diagnosed.
  3. Fasting Blood Sugar Test
    This test measures blood sugar after an 8-hour fast. If the fasting blood sugar is above the normal range, gestational diabetes is diagnosed.

If diagnosed, the doctor will develop a treatment plan, including dietary changes, physical activity, and possibly medication, to maintain normal blood sugar levels. After birth, the mother’s blood sugar will be monitored to determine if the diabetes continues, and appropriate treatment will begin.

Managing Gestational Diabetes

The following strategies can help manage blood sugar levels:

  1. Healthy Diet:
    • Choose healthy carbohydrates: Opt for complex carbs like whole grains (oats, brown rice) and non-starchy vegetables (e.g., broccoli, spinach) to control blood sugar levels.
    • Avoid simple sugars and processed foods: These foods can cause rapid blood sugar spikes.
    • Include protein and healthy fats: Each meal should have a protein source like eggs, chicken, fish, or low-fat dairy, along with healthy fats like olive oil and avocado.
    • Healthy snacks: Eat healthy snacks every 2-3 hours to stabilize blood sugar. Fresh fruit, nuts, and low-fat yogurt are great options.
    • Drink enough water: Stay hydrated by drinking water instead of sugary drinks.
    • Consult a nutritionist: A nutritionist can help develop a personalized diet plan.
  2. Physical Activity: Regular exercise helps control blood sugar and maintain a healthy weight. Walking, swimming, and yoga are excellent choices for pregnant women.
  3. Blood Sugar Monitoring: Regular blood sugar checks help manage the condition and prevent complications.
  4. Medications: In some cases, insulin may be necessary to control blood sugar. The doctor will recommend the most suitable treatment.

Conclusion

Gestational diabetes is a manageable condition. By following a healthy diet, staying active, and monitoring blood sugar levels, women can reduce risks to themselves and their babies. It’s important for pregnant women to stay in regular contact with their healthcare provider and report any unusual symptoms or concerns. With proper care, a healthy and successful pregnancy is achievable.

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