The double marker test in Delhi is a simple first-trimester blood test that helps screen your baby for the chance of Down syndrome and certain other chromosomal conditions. Done between 11 and 13 weeks — usually together with the NT scan — it measures two pregnancy-related substances in your blood to give an early risk estimate. At Edge Imaging & Diagnostics in Paschim Vihar, West Delhi, the double marker test is offered as part of accurate, well-coordinated first-trimester screening.
This guide explains what the double marker test is, when it is done, what the results mean, and how it works with the NT scan.
Reviewed by Dr. Nishant Thapar, MBBS, MD (Radiodiagnosis), Founder — Edge Imaging & Diagnostics, Paschim Vihar, New Delhi.
What Is the Double Marker Test?
The double marker test is a maternal blood test that measures two markers: free beta-hCG and PAPP-A (pregnancy-associated plasma protein-A). The levels of these two substances, adjusted for your age and pregnancy details, help estimate the risk of chromosomal conditions. It is a screening test, meaning it tells you the chance (high or low), not a yes/no diagnosis.
When Is the Double Marker Test Done?
The double marker test is done in the first trimester, between 11 weeks and 13 weeks 6 days of pregnancy — the same window as the NT scan. Pairing the blood test with the scan on similar dates gives the most accurate combined result.
What Does the Double Marker Test Screen For?
- Down syndrome (Trisomy 21)
- Edwards syndrome (Trisomy 18)
- Patau syndrome (Trisomy 13), in many protocols
It does not screen for every condition, and it is not the same as a neural tube (spine) screen — that is looked at on the anomaly scan.
Double Marker + NT Scan = Combined Screening
On its own the blood test is useful, but its accuracy is much higher when combined with the NT scan measurement and your age. Together this is called combined first-trimester screening, and it identifies a large proportion of affected pregnancies while keeping unnecessary invasive tests low. This is why we usually arrange the NT scan and the double marker test around the same time.
Understanding Your Double Marker Results
Results are usually reported as a risk ratio — for example 1 in 1,500 (low risk) or 1 in 150 (high risk) — along with the marker levels. A “low-risk” or “screen-negative” result is reassuring. A “high-risk” or “screen-positive” result does not mean your baby has the condition; it means further testing can be offered, such as NIPT (a more detailed blood test) or a diagnostic test like CVS or amniocentesis, with counselling to guide you.
| Screening test | Type | Best timing |
|---|---|---|
| Double marker | First-trimester blood test | 11–13.6 weeks |
| Triple / Quadruple marker | Second-trimester blood test | 15–20 weeks |
Is the Double Marker Test Safe?
Completely. It is an ordinary blood sample taken from your arm — no risk to you or your baby, and usually no fasting is required. Results are typically available within a few days.
Double Marker Test in Delhi — Why Choose Edge Imaging
At Edge Imaging & Diagnostics, the double marker test is offered by Dr. Nishant Thapar‘s team alongside a carefully performed NT scan, so your combined first-trimester screening is accurate and well coordinated, under our NABH-aligned quality standards. Expectant mothers across West Delhi — Paschim Vihar, Punjabi Bagh, Rajouri Garden, Moti Nagar and nearby areas — trust our reliable, patient-first prenatal care. To book a double marker test in Delhi, call 9555999960 or visit our contact page.
Frequently Asked Questions
How much does the double marker test cost in Delhi?
The double marker test in Delhi generally costs about ₹1,500–₹3,000, and slightly more when combined with the NT scan. Edge Imaging offers transparent pricing — please call for the current cost.
Do I need to fast for the double marker test?
Usually no fasting is required. It is a simple blood test; any specific instructions will be given when you book.
What does a “high-risk” double marker result mean?
It means the estimated chance is higher than the cut-off, not that your baby definitely has a condition. Further tests such as NIPT, CVS or amniocentesis can give a clear answer.
How accurate is the double marker test?
Combined with the NT scan and your age, first-trimester screening detects a high proportion of Down syndrome pregnancies. It is a screening test, so a definite diagnosis needs a follow-up test when the risk is high.
When will I get my results?
Double marker results are usually available within a few days, and are interpreted together with your NT scan for a combined risk.
Where can I get a double marker test near me in West Delhi?
Edge Imaging & Diagnostics in Paschim Vihar offers the double marker test with the NT scan for patients across West Delhi. Call 9555999960 to book.
Book Your Double Marker Test in Delhi
Screen early with confidence. Book a double marker test in Delhi at Edge Imaging & Diagnostics between 11 and 13 weeks, ideally with your NT scan, for accurate combined screening. Call 9555999960.
Disclaimer: This article is for general information and patient awareness only and does not replace a consultation with a qualified doctor. Screening choice and interpretation depend on your individual pregnancy. For trusted patient information on Down syndrome screening, see the NHS screening guide.