NIPT vs Double Marker vs Triple Marker vs Quadruple Marker: Which Test Do You Need?
NIPT or double marker? Compare all 4 pregnancy screening tests — timing, accuracy, cost in India & which one you actually need. A simple parents' guide.
Your doctor says "double marker test", the lab brochure says "NIPT," your cousin did a "quadruple marker" — and suddenly the first trimester feels like an exam you didn't study for. Take a breath. All four are screening tests that check the same core question — is the baby at higher risk of certain chromosomal conditions like Down syndrome? — they just differ in when they're done, how accurate they are, and what they cost.
First, one rule that explains everything: screening ≠ diagnosis
Hold onto this rule and the rest becomes simple. Screening tests are safe, need only the mother's blood, and are designed to tell you whether deeper testing is worth doing. Most "screen positive" mothers go on to have completely healthy babies after confirmation testing.
And one thing every Indian parent should know: none of these tests reveal the baby's gender in India — labs are legally barred from reporting it under the PCPNDT Act. Anyone promising otherwise is breaking the law.
The 4 tests at a glance
| Test (when) | Detection* | Cost in India |
|---|---|---|
| Double marker9–13 weeks | ~85–90% | ₹1,500–₹3,500 |
| NIPT10+ weeks | >99% | ₹10,000–₹25,000 |
| Triple marker15–20 weeks | ~65–70% | ₹2,000–₹3,500 |
| Quadruple marker15–20 weeks | ~75–80% | ₹3,000–₹5,000 |
That's the summary — now let's meet each test properly, one by one.
Double marker test: the standard first step
It measures two pregnancy proteins — free β-hCG and PAPP-A — and combines them with your age and the baby's neck-fold measurement (NT) on the scan to calculate a risk score for Down syndrome and the rarer trisomy 18 and 13. Results come as ratios like "1 in 1,200" (low risk) or "1 in 150" (higher risk — NIPT or diagnostic testing is then discussed).
It's inexpensive, widely available, and catches most cases — which is why it remains the default even in the NIPT era. Planning your early tests? Our first trimester guide lists everything visit by visit.
NIPT: the most accurate screening (at a price)
Why doesn't everyone just do NIPT? Cost. At ₹10,000–₹25,000 depending on the lab and panel, it's several times the price of marker tests. Doctors typically recommend it when the stakes or baseline risk are higher:
- Mother's age 35 or above (why age changes the math)
- IVF pregnancies or a previous pregnancy with a chromosomal condition
- A high-risk double marker result — NIPT is the perfect second step before deciding on invasive testing
- Parents who simply want the highest-accuracy answer and are comfortable with the cost
Remember: even NIPT is still a screening test. A high-risk NIPT is confirmed with amniocentesis before any decision.
Triple & quadruple marker: the second-trimester backup
Missed the 13-week window? It happens — late registration, travel, or a late pregnancy discovery. That's what the second-trimester marker tests are for, done between 15 and 20 weeks:
- The triple marker checks three proteins; the quadruple marker adds a fourth (inhibin A), lifting detection from roughly 65–70% to 75–80%. If you're choosing between them, quadruple is the better pick for a small price difference.
- Bonus: both include AFP, which also screens for neural tube (spine/brain) defects — something the double marker doesn't cover. Your 20-week anomaly scan then checks the baby's structures in detail.
Past 20 weeks? The anomaly scan and your doctor's assessment take over — talk to a fetal medicine specialist about what's still possible.
So which test should you take? A simple decision path
- Registered before 13 weeks? Double marker + NT scan for everyone. Low risk? You're done.
- 35+, IVF, previous chromosomal issue, or just want maximum certainty? Add NIPT (or do NIPT upfront).
- Double marker came back high-risk? NIPT next, then diagnostic confirmation only if NIPT is also high-risk.
- First visit after 14 weeks? Quadruple marker (15–20 weeks).
- Any high-risk screening result? A fetal medicine consultation — never panic, never decide on a screening result alone.
Most "high risk" screening reports end with a healthy baby and a relieved family. The report starts a conversation — it never ends one.
Frequently asked questions
It's not legally compulsory, but combined first-trimester screening (double marker + NT scan) is recommended for every pregnancy in India because age alone misses most cases — most babies with Down syndrome are born to mothers under 35.
Not necessarily — most high-risk screening results turn out fine. The usual next step is NIPT (over 99% accurate), and only if that is also high-risk does your doctor discuss confirmatory testing like amniocentesis.
NIPT is more accurate (>99% vs ~85–90% detection), but the double marker with NT scan is far cheaper and sufficient for most low-risk pregnancies. Many families use the double marker first and reserve NIPT for high-risk results — your doctor will tailor this to your age and history.
In India, no. Revealing fetal sex is illegal under the PCPNDT Act, and accredited labs do not report it — regardless of what any package claims.
No test is. NIPT detects over 99% of Down syndrome cases with very few false positives, but it remains a screening test — a high-risk NIPT result is always confirmed with a diagnostic test before any decision.
Approximate ranges: double marker ₹1,500–₹3,500, triple marker ₹2,000–₹3,500, quadruple marker ₹3,000–₹5,000, NIPT ₹10,000–₹25,000 depending on the lab and panel.
Key takeaways
- All four are screening tests — they estimate risk; only amniocentesis/CVS confirm.
- Double marker + NT scan (9–13 weeks) is the standard first screen for every pregnancy.
- NIPT is the accuracy king (>99%) — worth it after 35, in IVF pregnancies, or after a high-risk double marker.
- Quadruple beats triple if you've missed the first-trimester window (15–20 weeks).
- No test reveals gender in India, and no screening result should ever cause a decision without confirmation.
Confused about which test to book?
Bring your dates, your reports, and your questions — we'll map your exact screening plan in one visit. At Femme Nest Hospital, East Delhi, our obstetric and fetal medicine teams run the complete pathway under one roof: double marker, NT scan, NIPT coordination, and specialist counselling for any high-risk result — so you're never left googling a ratio at midnight.
Book a screening consultation Call or WhatsApp 092180 72466In your 9th–13th week right now? That's the double marker window — book this week.
This article is for educational purposes only and is not a substitute for medical advice. Test selection depends on your age, history, and scan findings — always follow your treating doctor's guidance.