How Does Gestational Diabetes Develop?
Insulin is the hormone that moves sugar from your bloodstream into your cells for energy. During pregnancy, your body naturally becomes more insulin resistant so that extra glucose is available to support your baby’s growth. For many women, the pancreas compensates by producing more insulin. When it cannot keep up, blood sugar rises and gestational diabetes develops.
This is not caused by anything you did wrong. It is largely driven by pregnancy hormones and genetics. As the placenta grows, insulin resistance tends to increase, which is why gestational diabetes is most commonly diagnosed between 24 and 28 weeks. Some women are more likely to develop it due to a personal or family history of diabetes, having polycystic ovarian syndrome (PCOS), or starting pregnancy at a higher weight.
How Screening Works
Most pregnant patients are screened during the second trimester, typically between 24 and 28 weeks. Women with higher risk factors may be tested earlier as part of their prenatal care.
The most common approach in the U.S. is a two-step screening process. The first step involves drinking a glucose solution and having blood drawn about an hour later. If blood sugar is elevated, a longer glucose tolerance test confirms the diagnosis. Some practices use a one-step approach with a longer test. Your provider will explain which method is being used and how to prepare.
Why Many Women Don’t Notice Symptoms
Many women with gestational diabetes have no obvious symptoms, which is exactly why routine screening is essential. When symptoms do appear, they often overlap with typical pregnancy changes like fatigue and frequent urination. Possible signs include increased thirst, urination that feels excessive even for pregnancy, blurred vision, or more frequent infections. These are worth mentioning if they show up suddenly or feel out of proportion.
What Happens After a Diagnosis
Management typically involves nutrition changes, safe physical activity, and home blood sugar monitoring. Some women also need medication, such as insulin, to reach their targets. The purpose of treatment is not perfection. It is steady, consistent blood sugar control that reduces risks for both you and your baby.
