What Causes Gestational Diabetes During Pregnancy?
- May 22
- 2 min read

One of the most common questions expectant mothers ask is, "Why did I get gestational
diabetes?" The answer isn’t always straightforward, but understanding the causes can
help you take control of your health during pregnancy.
Your body uses a hormone called insulin to help move sugar from your blood into your
cells, where it’s used for energy. During pregnancy, the placenta produces hormones
that can block the effects of insulin. This is called insulin resistance. Insulin resistance is also one of the underlying reasons for the development of Type 2 Diabetes.
The Role of Hormones
As the baby grows, the placenta produces more hormones such as estrogen, cortisol,
and human placental lactogen. These hormones make it harder for insulin to work
properly. The more insulin resistance you have, the more sugar stays in your
bloodstream and therefore causing hyperglycaemia. Glucose from food is required for energy for all bodily functions and your day to day activities.
Why Does This Matter?
When your body can't make enough insulin to overcome this resistance, blood sugar
levels rise. This leads to gestational diabetes. It usually happens in the second or third
trimester when hormone levels peak.
Genetic and Environmental Factors
Since the above happens during all pregnancies, there are more factors which cause some people to develop gestational diabetes while others do not. These include:
● Genetics: If diabetes runs in your family, you might be more likely to develop it.
● Weight: Being overweight before pregnancy increases insulin resistance.
● Age: Women over 25 are at a higher risk.
● Ethnicity: Certain groups, like African, Asian, and Hispanic women, are more
prone.
Can You Prevent It?
You can’t change your genes, but you can make lifestyle changes:
● Maintain a healthy weight before pregnancy
● Eat a balanced diet rich in fiber
● Exercise regularly
Conclusion
Gestational diabetes is caused by natural changes in your body, but certain factors can
make it more likely. Understanding these causes helps you take the right steps for a
healthy pregnancy.
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