Why It’s Important to Keep Gestational Diabetes on Your Radar

Diabetes is likely at the top of your patient-screening list, as it’s one of the most common diseases among men and women alike — and one whose incidence rate is increasing at warp speed. And if pregnant women are among your patient population, it pays to keep an eye out for gestational diabetes, as it is becoming more common and has important health implications for mother and child.

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Why It’s Important to Keep Gestational Diabetes on Your Radar

June 1, 2021


Diabetes is likely at the top of your patient-screening list, as it’s one of the most common diseases among men and women alike — and one whose incidence rate is increasing at warp speed.1 And if pregnant women are among your patient population, it pays to keep an eye out for gestational diabetes, as it is becoming more common and has important health implications for mother and child.2


With that in mind, let’s take an in-depth look at gestational diabetes: how it develops, which of your patients is most likely to experience it and why it’s important to detect this condition in a timely manner.

pregnant mother and daughter smiling at each other sitting on couch

What Is Gestational Diabetes?

According to the Centers for Disease Control and Prevention (CDC), gestational diabetes develops during pregnancy, among women who didn’t have diabetes prior to gestation. It typically appears during the middle of a woman’s pregnancy, which is why healthcare providers typically screen for it between weeks 24 and 28.3

Unlike Type 1 diabetes, which involves the body producing little or no insulin,4 gestational diabetes arises when insulin is produced, but hormones produced by the woman’s placenta, including cortisol, estrogen and progesterone, interfere with the proper utilization of that insulin. This causes glucose to build up in the blood rather than being used by the cells throughout the body.5,6

What Leads to Gestational Diabetes?

Experts aren’t sure what causes the condition.7 But they do know that a woman’s body is naturally more insulin-resistant during pregnancy as her metabolism adjusts to accommodate the fetus’s nutritional needs. In addition, as mentioned above, the natural hormones of pregnancy can affect how the body uses insulin. And as the pregnancy progresses and the placenta grows, increasing levels of these hormones affect the body’s use of insulin further, which helps explain why the condition typically develops further along in pregnancy.6,8

Experts at Brigham Health/Brigham and Women’s Hospital say that other factors common during pregnancy also may increase the risk of gestational diabetes. For instance, they say, more fat is stored in a woman’s body, more calories are consumed, and less exercise is common. All of these factors can contribute to higher glucose levels, possibly leading to gestational diabetes.8

According to the American College of Obstetricians and Gynecologists (ACOG), a pregnant woman’s body usually can make more insulin to keep her glucose levels normal. But some women’s bodies are not able to accommodate the increased need for insulin, which causes glucose levels to rise and gestational diabetes to develop.9

How Common It Is?

Gestational diabetes is fairly common: Almost 10 percent of all pregnancies in the U.S. are affected by the condition each year, the American Diabetes Association (ADA) reports.7 What’s more, its incidence is on the rise worldwide, according to a 2020 study published in Current Diabetes Reviews.2

While the rising rates of obesity may be partly responsible for the increased incidence,10 researchers have reported that a trend in advanced maternal age, increased rates of diabetes in general and a decrease in physical activity may also contribute.11

How to Detect It?

All pregnant women should be screened for gestational diabetes, typically between weeks 24 and 28, as mentioned. However, if a woman has risk factors such as those listed below, she should be tested earlier, ACOG advises.9 The ADA, meanwhile, states that a woman should be tested for Type 2 diabetes at her first prenatal visit if she has risk factors.12

Whether you opt to perform a one-hour or three-hour glucose test (the one-hour glucose challenge test is typically used for women at low risk while the three-hour glucose tolerance test is for those at higher risk, or for suspicious results on the one-hour test),13, 14 the HemoCue® Glucose 201 System gives you the ability to perform CLIA-waived tests in the office, with results delivered quickly and reliably.

masked doctor diagnosing masked, pregnant woman

Are Certain Women at Higher Risk?

According to ACOG, any woman can develop gestational diabetes. That said, certain women may be at higher risk, including those who:9

 Are inactive
 Are overweight or obese
 Are of African, Asian, Hispanic, Native American or Pacific Island descent
 Delivered a baby weighing 9 pounds or more in an earlier pregnancy
 Have a history of gestational diabetes
 Have a history of heart disease
 Have high blood pressure
 Have polycystic ovary syndrome

In addition, being older than 25, having a family history of diabetes or having prediabetes may increase the risk, Brigham Health/Brigham and Women’s Hospital reports.8 Some experts also believe that having a vitamin D deficiency may put some women at higher risk.15

How Gestational Diabetes Can Affect a Woman’s Health?

According to ACOG, women with gestational diabetes are more likely to experience other potentially serious medical conditions during pregnancy, including high blood pressure and preeclampsia. In addition, women with gestational diabetes can transfer too much glucose to the fetus, which can cause excess weight gain and delivery of a large baby (one weighing 9 pounds or more).9

Delivering a large baby can lead to such complications as labor difficulties, perineal tears, Cesarean section and heavy postpartum bleeding for the woman. The baby can suffer negative outcomes as well, including low glucose levels, jaundice, respiratory difficulties, shoulder dystocia and other birth trauma, and even stillbirth.9

Gestational diabetes can have health effects after pregnancy, too. In addition to dramatically increasing the risk of diabetes in future pregnancies, the condition puts a woman at increased risk of developing Type 2 diabetes. Approximately 30 percent of women with gestational diabetes will have elevated blood sugar or Type 2 diabetes after giving birth,9 while half of all women who had gestational diabetes develop Type 2 diabetes later in life.3

Because of this, the CDC recommends that women with gestational diabetes be tested for Type 2 diabetes six to 12 weeks after delivery, and then every one to three years after that.3

pregnant women leaning their backs against exercise balls

Can Gestational Diabetes Be Prevented?

The National Institute of Diabetes and Digestive and Kidney Diseases at the National Institutes of Health says that a woman may reduce her risk of gestational diabetes before she becomes pregnant by losing excess weight and getting regular exercise.13 Exercise during pregnancy may be helpful as well: Experts say that getting 30 minutes or more of strenuous exercise three to four days per week may help prevent the condition. Pregnancy-safe options include brisk walking, cycling and swimming.15

Research also suggests that probiotics may help prevent gestational diabetes,2 as may dietary supplements containing myo-inositol.15

We hope this primer has helped reinforce how important it is to remain vigilant when it comes to gestational diabetes. It’s a special condition affecting a very special population, and its correct diagnosis and treatment can contribute to the best possible outcome: a healthy mother and child.

1 “National Diabetes Statistics Report 2020: Estimates of Diabetes and Its Burden in the United States.” U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, https://www.cdc.gov/diabetes/pdfs/data/statistics/national-diabetes-statistics-report.pdf. Accessed May 2021.
2 Homayouni, Aziz, et al. “Prevention of Gestational Diabetes Mellitus (GDM) and Probiotics: Mechanism of Action: A Review.” Current Diabetes Reviews, vol. 16, no. 6, 2020, pp. 538–45. PubMed, doi:10.2174/1573399815666190712193828. https://pubmed.ncbi.nlm.nih.gov/31544699/
3 “Gestational Diabetes and Pregnancy.” Centers for Disease Control and Prevention, 14 July 2020, https://www.cdc.gov/pregnancy/diabetes-gestational.html.
4 “Type 1 Diabetes - Symptoms and Causes.” Mayo Clinic, https://www.mayoclinic.org/diseases-conditions/type-1-diabetes/symptoms-causes/syc-20353011. Accessed May 2021.
5 “Gestational Diabetes Mellitus (GDM).” Johns Hopkins Medicine, https://www.hopkinsmedicine.org/health/conditions-and-diseases/diabetes/gestational-diabetes. Accessed May 2021.
6 “Gestational Diabetes FAQs.” Brigham and Women’s Hospital, https://www.brighamandwomens.org/obgyn/maternal-fetal-medicine/pregnancy-and-medical-conditions/frequently-asked-questions-about-gestational-diabetes. Accessed May 2021.
7 “Gestational Diabetes - Symptoms, Treatments.” American Diabetes Association, https://www.diabetes.org/diabetes/gestational-diabetes. Accessed May 2021.
8 “Gestational Diabetes.” Brigham and Women’s Hospital, http://healthlibrary.brighamandwomens.org/Search/85,P00337?_ga=2.165993529.681786189.1620234802-987813360.1620234802. Accessed May 2021.
9 “Gestational Diabetes.” American College of Obstetricians and Gynecologists, https://www.acog.org/en/womens-health/faqs/gestational-diabetes. Accessed May 2021.
10 Lende, Michelle, and Asha Rijhsinghani. “Gestational Diabetes: Overview with Emphasis on Medical Management.” International Journal of Environmental Research and Public Health, vol. 17, no. 24, Dec. 2020. PubMed, doi:10.3390/ijerph17249573. https://pubmed.ncbi.nlm.nih.gov/33371325/
11 Ferrara, Assiamira. “Increasing Prevalence of Gestational Diabetes Mellitus: A Public Health Perspective.” Diabetes Care, vol. 30, no. Supplement 2, July 2007, pp. S141–46. care.diabetesjournals.org, doi:10.2337/dc07-s206. https://care.diabetesjournals.org/content/30/Supplement_2/S141
12 “Diabetes and Pregnancy.” American Diabetes Association, https://www.diabetes.org/diabetes/newly-diagnosed/diabetes-and-pregnancy. Accessed May 2021.
13 “Gestational Diabetes.” National Institute of Diabetes and Digestive and Kidney Diseases, https://www.niddk.nih.gov/health-information/diabetes/overview/what-is-diabetes/gestational. Accessed May 2021.
14 “Glucose Tolerance Test.” Mayo Clinic, https://www.mayoclinic.org/tests-procedures/glucose-tolerance-test/about/pac-20394296. Accessed May 2021.
15 National Center for Biotechnology, et al. “What Can Help Prevent Gestational Diabetes?” Institute for Quality and Efficiency in Health Care (IQWiG), 2020. https://www.ncbi.nlm.nih.gov/books/NBK441575/.

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