Gestational diabetes: the South Asian picture

Gestational diabetes mellitus (GDM), raised blood sugar that develops during pregnancy, affects South Asian women at significantly higher rates than the global average. India has a national GDM prevalence of 22.4%, meaning nearly 1 in 4 pregnant Indian women is affected. This is not a lifestyle failing; it reflects the way South Asian bodies process insulin, which is strongly influenced by genetic predisposition.

South Asian women develop metabolic complications at lower body weights than European women. The GDM risk in South Asian women exceeds 5% at a BMI of just 21.5 kg/m², a level most clinical systems would classify as normal weight. This matters because standard screening protocols using BMI 25 as the threshold may miss a substantial proportion of South Asian women at risk.

The pre-conception period is the right time to understand your risk. If you have a family history of type 2 diabetes, a previous pregnancy with GDM, PMOS, or a BMI over 21 if South Asian, this is information worth raising with your doctor before or early in any pregnancy.

If you are planning a pregnancy and have risk factors for GDM, family history of type 2 diabetes, previous GDM, PMOS, or higher BMI, it is worth discussing pre-conception screening with your doctor. A fasting glucose, HbA1c, and insulin resistance screen gives your clinical team a baseline that helps them interpret your pregnancy results in context.

Post-meal walking (15 minutes after each meal, at conversational pace) and resistance training 2–3 times per week both improve insulin sensitivity at the cellular level, independent of weight loss. These are the interventions with the strongest pre-conception evidence for South Asian women specifically.

If GDM is diagnosed or suspected in a previous pregnancy, the risk in subsequent pregnancies is around 40–50%. This is not a verdict on future pregnancies, it is information that supports earlier, more careful monitoring.

Women who have GDM have a 7-fold higher risk of developing type 2 diabetes within 10 years compared to women without GDM. This is why a post-pregnancy glucose check at 6–12 weeks and annual HbA1c monitoring matter, not as alarm signals, but as information that helps you protect your long-term health.

For South Asian women specifically, this downstream risk is higher and arrives earlier. Understanding it allows you to use the post-pregnancy period as an opportunity to establish patterns, diet, movement, sleep, that reduce the trajectory.