🤰Gestational Diabetes OGTT in India: DIPSI & Cut-offs
Pregnancy sugar tests are not the same as adult HbA1c. Here is DIPSI vs fasting OGTT, how to sit the 75 g drink, and why the postpartum check still matters.
Scanura Editorial
Health Education Team
Written by Scanura Editorial for health education. This article is not a substitute for advice from a qualified doctor. About our editorial standards
Gestational Diabetes OGTT in India: DIPSI, Fasting & Cut-offs
Pregnancy lab week. Someone says sugar test. Someone else says 75 gram glucose, DIPSI, IADPSG, fasting vs any time. You hold a sweet drink and a timer. Gestational diabetes mellitus (GDM) is high blood sugar first recognised in pregnancy. It is common in Indian antenatal clinics, and it is not a character judgment about mithai.
This is a 2026 India guide to GDM testing: why protocols differ, what the numbers mean, and which follow-up labs matter after delivery.
Related reading: blood sugar / HbA1c, prediabetes under 30, HbA1c can mislead — HbA1c is not the usual GDM screen.
Why Pregnancy Gets Its Own Sugar Rules
Hormones from the placenta make the body more insulin-resistant so the baby gets glucose. In some women the pancreas cannot keep up. Risks include larger babies, birth complications, and a much higher chance of type 2 diabetes later — which is why the postnatal glucose check is not optional paperwork.
HbA1c reflects months, not a placental sprint, and pregnancy changes red cells. Obstetric protocols therefore lean on glucose drinks (OGTT / DIPSI), not A1c-as-diagnosis.
Two Protocols You Will Hear in India
There is no single WhatsApp cut-off. Your obstetrician’s hospital SOP wins.
| Approach | How it is usually done | Educational positive (examples — confirm on your slip) |
|---|---|---|
| DIPSI (widely used in many Indian clinics) | 75 g oral glucose, often non-fasting / any time, 2-hour venous glucose | 2-hour ≥ 140 mg/dL is the commonly cited DIPSI GDM threshold |
| WHO / IADPSG-style OGTT | Fasting, then 75 g, blood at 0, 1, 2 hours | Any one of: fasting ≥ 92, 1-hour ≥ 180, 2-hour ≥ 153 mg/dL (IADPSG numbers clinicians discuss) |
If the lab wrote “DIPSI” do not “convert” it in your head to a fasting OGTT. If they asked you to fast from midnight, that is a different graph.
Typical timing: 24–28 weeks for universal screening in many centres; earlier if prior GDM, PCOS, strong family history, or first-visit high glucose.
Vomiting the drink, walking out for a samosa, or using a capillary glucometer instead of a venous lab draw can wreck the interpretation.
How to Sit the Test Without Chaos
- Follow fasting vs non-fasting exactly as printed.
- Stay in the waiting room; no extra snacks.
- Tell staff if you vomit — they may reschedule, not guess.
- List steroids, terbutaline, and illness — they move glucose.
- Known pre-pregnancy diabetes is not GDM; that is a different, tighter pathway.
If the Result Is High
GDM care is diet + glucose monitoring ± insulin/metformin as prescribed — not a Facebook “fenugreek protocol.” After delivery, many women are asked for a 6–12 week OGTT because the placenta is gone and we need to know what remains.
| After pregnancy | Why |
|---|---|
| Postpartum OGTT | Catch persistent diabetes / prediabetes |
| Lifelong fasting/HbA1c cadence | History of GDM is a type 2 risk flag |
| Breastfeeding support as advised | Metabolic plus infant nutrition — clinician/lactation, not a blog |
How scanura Helps
If the antenatal PDF includes glucose, thyroid, CBC, or GDM OGTT numbers, upload it to scanura or create an account. scanura can explain which glucose row is marked high in Hindi or English so you ask the obstetrician clearer questions.
It does not manage insulin in pregnancy or replace an OGTT protocol.
The blood test checker can range-check a single non-pregnancy value; pregnancy targets differ.
Key Takeaways
- GDM is screened with glucose drinks, not routine HbA1c.
- DIPSI and fasting OGTT are different tests — read the method on the report.
- Sit still, don’t snack, report vomiting.
- Treatment is obstetric, not leftover adult diabetes tablets from an uncle.
- Postpartum sugar testing is part of the disease, not extra homework.
- Upload confusing PDFs to scanura; pregnancy care stays with your obstetrician.
Disclaimer: This article is for educational purposes only. GDM diagnostic criteria differ by FOGSI/DIPSI/WHO/IADPSG and by hospital. Pregnancy glucose targets and medicines are specialist decisions. scanura does not provide obstetric diagnosis. Always follow your obstetrician.
Medical References
Step-by-Step Guide
- 1
Read whether the lab wants fasting or DIPSI any-time
They are different protocols; do not mix cut-offs.
- 2
Drink the 75 g glucose and stay put
No samosa interval; report vomiting instead of guessing.
- 3
Use the venous lab draw the obstetrician ordered
A home glucometer is not the diagnostic OGTT.
- 4
If GDM is diagnosed, follow obstetric diet and monitoring
Not leftover adult diabetes tablets from a relative.
- 5
Book the postpartum glucose test
GDM is a lifelong type-2 risk flag.
- 6
Upload antenatal glucose PDFs to scanura
Number explanation only; pregnancy care stays with your obstetrician.
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