What Is Gestational Diabetes and Could You Be at Risk?

Gestational diabetes (GDM) is high blood sugar that develops during pregnancy in women who didn't have diabetes before. It is very common, very manageable, and in most cases goes away completely after delivery.

During pregnancy, your placenta produces hormones to support your baby's growth. A side effect of these hormones is that they make your body more resistant to insulin — the hormone that moves sugar from your blood into your cells. In most pregnancies, the pancreas compensates by producing extra insulin. In some women, it can't keep up, and blood sugar rises above normal. That's gestational diabetes.

It is not caused by eating too much sugar. It is not your fault. It is a hormonal and metabolic response to pregnancy.

Indian women are at a significantly higher risk of GDM than women in Western countries. South Asian women develop GDM at lower BMI thresholds — meaning you don't have to be overweight for it to happen. The genetic tendency toward insulin resistance is higher in South Asian populations, which is why your doctor in India takes this test seriously regardless of your weight or health history.

Your doctor may recommend earlier or more frequent testing if you have any of the following:

• A family history of type 2 diabetes (parents, siblings)
• PCOS (polycystic ovary syndrome)
• A previous pregnancy with GDM
• BMI above 23 — the Indian-specific threshold
• A previous baby born weighing more than 4 kg
• Thyroid disorders
• Age above 30

That said, GDM can occur without any risk factors. The test is recommended for every pregnant woman in India.

Unmanaged GDM can lead to a larger-than-average baby (macrosomia), which can make delivery more complex, and can cause the baby's blood sugar to dip after birth. But well-managed GDM does not put your baby at risk. Diet, monitoring, and if needed, medication are highly effective. Most babies born to mothers with managed GDM are completely healthy.

In most cases, yes. Once the placenta is delivered, the hormones causing insulin resistance are gone and blood sugar returns to normal within days. Your doctor will confirm this with a follow-up test 6–12 weeks after delivery. One thing worth knowing: having GDM does increase your long-term risk of developing type 2 diabetes — a reason to maintain healthy habits after pregnancy, not a reason to panic now.

Can I get GDM even if I eat healthy and am not overweight? Yes. GDM is primarily hormonal. Indian women are genetically predisposed to higher insulin resistance, which means it can occur in lean, healthy women.

Is GDM the same as type 2 diabetes? No. GDM is specific to pregnancy, caused by placental hormones, and resolves after delivery in most cases. They are related conditions but not the same.

My mother had diabetes. Does that mean I'll definitely get GDM? A family history increases risk but doesn't guarantee GDM. Many women with a strong family history of diabetes have completely normal results.