What Is Non-Invasive Prenatal Testing (NIPT)?

posted 9th March 2026

Posted 2 weeks ago

By The Daisyscan Team

Blog

What Is Non-Invasive Prenatal Testing (NIPT)?

A Complete Guide for Expecting Parents – by Daisyscan

Pregnancy is an exciting journey filled with milestones, scans, and important decisions. One screening option you may hear about early in pregnancy is Non-Invasive Prenatal Testing (NIPT).

At Daisyscan, we believe informed parents feel more confident and reassured. This guide explains:

  • What NIPT is
  • What it tests for
  • What to expect during the process
  • How to understand the results
  • The accuracy and limitations of the test

🌼 What Is NIPT?

Non-Invasive Prenatal Testing (NIPT) is a safe blood test performed during pregnancy to screen for certain genetic conditions in your baby.

It is called non-invasive because it only requires a blood sample from the mother — there is no risk to the baby, unlike diagnostic procedures such as:

  • Amniocentesis
  • Chorionic villus sampling

NIPT analyses tiny fragments of your baby’s DNA (called cell-free fetal DNA) that naturally circulate in your bloodstream.

It can usually be performed from 10 weeks of pregnancy onwards.

🧬 What Does NIPT Test For?

NIPT screens for specific chromosomal conditions caused by an extra or missing chromosome.

Common Conditions Screened:
Condition - Also Known As- What It Means
Down syndrome - Trisomy 21 - Extra chromosome 21
Edwards syndrome - Trisomy 18 - Extra chromosome 18
Patau syndrome - Trisomy 13 - Extra chromosome 13

Some NIPT panels may also screen for:

  • Sex chromosome conditions (such as Turner syndrome)
  • Baby’s sex (if parents wish to know)
  • Selected microdeletions (in expanded panels)

At Daisyscan, we will always explain exactly what your chosen test includes.

🩸 How Does NIPT Work?

Here’s a simple visual breakdown:

Step 1: Mother's Blood Sample
↓
Step 2: Lab extracts cell-free DNA
↓
Step 3: DNA fragments analysed
↓
Step 4: Chromosome count assessed
↓
Step 5: Risk result generated

Your blood contains:

  • Your own DNA
  • Small fragments of your baby’s DNA from the placenta

The laboratory uses advanced genetic sequencing technology to measure chromosome amounts and detect differences.

🏥 What to Expect at Your Appointment

The process is simple and reassuring:

1️⃣ Consultation
We confirm:

Gestational age (minimum 10 weeks)

Medical history

Your screening preferences

2️⃣ Blood Draw
A standard blood sample is taken from your arm.

3️⃣ Laboratory Analysis
The sample is sent to a specialist genetics lab.

4️⃣ Results
Results are typically available within 5 working days.

You will receive:

A clear explanation of the findings

Support if further testing is recommended

📊 Understanding the Results

NIPT is a screening test, not a diagnostic test.

Results are usually reported as:

✔️ Low Risk
Very unlikely that the baby has the condition screened for.

⚠️ High Risk
Increased chance of the condition being present.
Further diagnostic testing (such as amniocentesis) may be necessary.

Understanding Risk Results

Chromosome Count Analysis

Normal Chromosome Amount
|████████████| → LOW RISK

Extra Chromosome Detected
|██████████████| → HIGH RISK

📈 What Do the “Risk Ranges” Mean?

NIPT may provide:

A probability (e.g., 1 in 10,000 – low risk)

Or a simple "Low Risk / High Risk" classification

Example:

Result Meaning
1 in 10,000 Very low probability
1 in 2 Higher probability – further testing advised
It’s important to remember:

👉 Alow-risk result does not guarantee the baby does not have a condition.
👉 A high-risk result does not confirm the baby has the condition.

Only diagnostic tests can confirm a diagnosis.

🎯 How Accurate Is NIPT?

NIPT is highly accurate for the most common conditions:

Condition Detection Rate
Down syndrome >99%
Trisomy 18 ~97–99%
Trisomy 13 ~92–97%
However, accuracy depends on:

  • Gestational age
  • Maternal weight
  • Placental DNA fraction
  • Twin pregnancies
  • Laboratory quality

Daisyscan uses trusted accredited laboratories to ensure the highest possible standards.

⚠️ Limitations of NIPT

While NIPT is advanced, it does have limitations:

❌ It is not diagnostic
It cannot definitively confirm a condition.

❌ It does not test for all genetic disorders
Only specific chromosomal conditions are screened.

❌ Rare false positives and false negatives can occur
Biological factors such as:

  • Confined placental mosaicism
  • Vanishing twin
  • Maternal chromosomal variation

may influence results.

❌ Occasionally, a “no result” may occur
If there is insufficient fetal DNA, a repeat test may be required.

🧠 Is NIPT Right for You?

NIPT is suitable for:

All pregnant women from 10 weeks

Those seeking early reassurance

Those with increased chance results from combined screening

Parents wanting more detailed chromosomal screening

At Daisyscan, we provide personalised guidance to help you decide what feels right for your pregnancy journey.

🌸 Final Thoughts from Daisyscan

Non-Invasive Prenatal Testing offers:

✔️ Early insight
✔️ High accuracy
✔️ No risk to your baby
✔️ Peace of mind

However, understanding both the strengths and the limitations is essential when making informed choices.

If you would like to discuss NIPT further, our friendly team at Daisyscan is here to support you every step of the way.