Non-Invasive Prenatal Screening Test (NIPT Test): A Complete Guide to Timing, Screening & Results

Table of Contents

• What is a Non-Invasive Prenatal Screening Test?
• How Does Non Invasive Prenatal Screening Test Work?
• When is Non Invasive Prenatal Screening Test Done During Pregnancy?
• Why is NIPT Recommended?
• What Conditions Does NIPT Screen For?
• Is NIPT Test Safe for the Baby?
• What Does a Low-Risk NIPT Result Mean?
• What Does a High-Risk NIPT Result Mean?
• What if NIPT Shows
• Can Non Invasive Prenatal Screening Test Be Done in Every Pregnancy?
• Why Should You Consult a Doctor Before the NIPT Test?
• Understand Your NIPT Results With Expert Guidance
• Advanced Prenatal Screening with Expert Gynaecology Care in Gurgaon

Every expectant parent wants to know that their baby is developing well. Along with routine pregnancy scans and check-ups, modern prenatal care offers screening tests that can provide additional information about certain genetic and chromosomal conditions.

One such option is the Non-Invasive Prenatal Screening Test (NIPT), also called Non-Invasive Prenatal Testing (NIPS) or cell-free DNA screening.

Unlike invasive prenatal procedures, NIPT requires only a blood sample from the mother. The test analyses tiny fragments of DNA from the placenta that circulate in the mother's bloodstream and screens for an increased chance of certain chromosomal conditions.

But what exactly does NIPT detect? When can you take the test? Is it necessary for every pregnancy? And what does it mean if the result comes back high risk?

Understanding these questions can help you make informed decisions about prenatal screening with your doctor.

What is a Non-Invasive Prenatal Screening Test?

The Non-Invasive Prenatal Screening Test is a blood test used during pregnancy to screen for certain chromosomal abnormalities in the developing baby.

During pregnancy, small fragments of DNA from the placenta enter the mother's bloodstream. This DNA is known as cell-free DNA (cfDNA). A blood sample from the mother can be analysed to look for changes in the amount of DNA associated with specific chromosomes.

Dr. Himani Kundoo, one of the best gynaecologist doctors in Gurgaon at Miracles Healthcare, explains, “NIPT is a simple blood-based screening test that can provide useful information about the likelihood of certain chromosomal conditions. However, it is important for expecting parents to understand that a screening result does not by itself confirm a diagnosis.”

The primary conditions commonly screened through NIPT include:

• Down syndrome (Trisomy 21)

• Edwards syndrome (Trisomy 18)

• Patau syndrome (Trisomy 13)

Depending on the laboratory and test panel, NIPT may also include screening for certain sex chromosome differences and other chromosomal conditions.

Importantly, NIPT is a screening test, not a diagnostic test. This means it estimates the chance of a condition rather than confirming that the baby definitely has it. If a result indicates a higher chance, your doctor may recommend further evaluation or diagnostic testing to understand the finding more clearly.

How Does Non Invasive Prenatal Screening Test Work?

The principle behind the NIPT test in pregnancy is relatively simple.

• A blood sample is taken from the pregnant woman, usually from a vein in the arm. The sample contains the mother's blood along with small fragments of placental DNA.

• The laboratory separates and analyses this cell-free DNA to identify patterns that may suggest an increased chance of certain chromosomal conditions.

For example, if the analysis detects an unusual amount of chromosome 21-associated DNA, it may indicate an increased chance of Trisomy 21, or Down syndrome.

The result is then reported according to the screening system used by the laboratory, often as:

• Low risk

• High risk

• No result or inconclusive

The doctor interprets the result along with the pregnancy history, ultrasound findings, and other relevant information.

When is Non Invasive Prenatal Screening Test Done During Pregnancy?

This non-invasive prenatal testing is generally done around 10 weeks of pregnancy. The timing is important because the test relies on cell-free DNA from the placenta being present in the mother's bloodstream in sufficient quantity.

Dr. Himani says, “NIPT testing can usually be done from around the 10th week of pregnancy. Choosing the right time for the test helps ensure that there is enough placental DNA in the mother’s blood sample for the laboratory to analyse.”

If the test is performed too early or the sample contains an insufficient amount of placental DNA, the laboratory may not be able to provide a reliable report. This may result in a no-result or inconclusive report.

Your obstetrician can advise you about the appropriate timing based on your gestational age and individual pregnancy.

Along with the right prenatal care, nutrition plays an important role in a healthy pregnancy. Read our guide on Foods to Eat During the First Trimester of Pregnancy for expert tips. 

Why is NIPT Recommended?

NIPT can provide additional screening information about some of the most common chromosomal conditions during pregnancy.

Your doctor may discuss NIPT with you if:

• You want additional prenatal screening information.

• You have an increased chance of a chromosomal condition based on other screening.

• An ultrasound has identified a finding that needs further evaluation.

• You have a previous pregnancy affected by a chromosomal abnormality.

• Maternal age or other pregnancy factors may influence the screening plan.

• You want a highly sensitive screening option for common trisomies.

However, NIPTs testing is not automatically required for every pregnancy. The decision depends on your medical history, pregnancy findings, available screening options, and personal preferences.

What Conditions Does NIPT Screen For?

The main purpose of standard NIPT is screening for certain trisomies.

1. Down Syndrome: Trisomy 21

Down syndrome occurs when there is an extra copy of chromosome 21.

NIPT is particularly effective at screening for Down syndrome and can identify pregnancies with an increased likelihood of this condition.

Dr. Himani Kundoo says, “NIPT lab test can help assess the chance of Down syndrome early in pregnancy, but a high-risk result needs confirmation through diagnostic testing.”

However, even a high-risk NIPT result must be confirmed through appropriate diagnostic testing before a definitive diagnosis is made.

2. Edwards Syndrome: Trisomy 18

Edwards syndrome occurs when there is an extra copy of chromosome 18. It can be associated with serious developmental and medical complications. NIPT can screen for an increased chance of Trisomy 18.

3. Patau Syndrome: Trisomy 13

Patau syndrome occurs when there is an extra copy of chromosome 13.

Dr. Himani says, “A high-risk NIPT result for Trisomy 13 indicates an increased likelihood, but it does not confirm that the baby has the condition.”

Like other chromosomal conditions screened through NIPT, a high-risk result requires appropriate follow-up and, when advised, diagnostic testing for confirmation.

Want to know more about prenatal tests? Explore our Exploring the World of Prenatal Testing guide to understand the different tests and why they matter during pregnancy. 

Is NIPT Test Safe for the Baby?

Since NIPT blood test only requires a maternal blood sample, it does not involve direct access to the uterus or the developing baby.

The procedure itself is similar to having a routine blood test. The usual risks are related to blood collection, such as temporary discomfort or bruising at the needle site.

However, while the test procedure is non-invasive, the information it provides needs careful interpretation. A high-risk result can sometimes cause considerable anxiety if parents are not aware that NIPT is a screening test rather than a diagnosis.

This is why discussing the result with your obstetrician is important.

What Does a Low-Risk NIPT Result Mean?

A low-risk result means that the screening found a lower likelihood of the chromosomal conditions included in the test.

For many parents, this can provide reassurance.

Dr. Kundoo says, “A low-risk NIPT result is reassuring, but it does not rule out every possible genetic or developmental condition, so regular prenatal care remains important.”

However, low risk does not mean zero risk. NIPT only screens for specific conditions included in the selected test. It does not evaluate every possible genetic disorder, birth defect, or developmental condition.

Regular prenatal appointments and recommended ultrasound scans therefore remain important.

What Does a High-Risk NIPT Result Mean?

A high-risk result can understandably be worrying, but it is important not to interpret it as a confirmed diagnosis. A high-risk result means that the pregnancy has a higher chance of the specific chromosomal condition screened for.

Your doctor may consider:

• The NIPT result

• Pregnancy history

• Maternal age

• Ultrasound findings

• Other prenatal screening results

• Whether diagnostic testing is appropriate

If necessary, diagnostic testing can provide more definitive information.

The next step after a high-risk NIPT result should therefore be a discussion with your obstetrician or genetic counselling professional rather than making decisions based solely on the screening report.

What if NIPT Shows "No Result"?

Sometimes an NIPT blood test report may say “no result,” “inconclusive,” or “insufficient fetal fraction.”

This does not necessarily mean that something is wrong with the baby.

One reason is that there may not have been enough placental cell-free DNA in the blood sample for the laboratory to analyse adequately.

Dr. Himani Kundoo clarifies, “An inconclusive NIPT result does not automatically indicate a problem with the baby. Your doctor can assess the reason and advise whether repeating the test or choosing another screening or diagnostic option would be appropriate.”

The possibility of obtaining an inconclusive result can be influenced by factors such as:

• Gestational age at the time of testing

• Amount of placental DNA in the mother's blood

• Maternal factors

• Technical or laboratory factors

Depending on the circumstances, your doctor may suggest repeating NIPT or considering another screening or diagnostic approach.

Can Non Invasive Prenatal Screening Test Be Done in Every Pregnancy?

NIPT can be considered in many pregnancies, but whether it is appropriate depends on the individual situation.

Your doctor may consider:

• Your current gestational age

• Previous pregnancy history

• Ultrasound findings

• Other screening results

• Maternal and pregnancy-related factors

• The specific conditions included in the available NIPT panel

Why Should You Consult a Doctor Before the NIPT Test?

Consulting a gynaecologist before taking NIPT is important because every pregnancy is different. Your gynecology doctor can consider your gestational age, medical history, previous test results, and individual pregnancy needs to determine whether NIPT is appropriate for you.

Dr. Himani says, “Speaking with your doctor before NIPT helps you understand what the test screens for, what different results may mean, and whether any follow-up testing may be needed.”

A doctor can also help you understand what low-risk, high-risk, or inconclusive results may mean and guide you about further screening or diagnostic tests, if required.

Understand Your NIPT Results With Expert Guidance

NIPT is a valuable prenatal screening test that can help assess the likelihood of certain chromosomal conditions, but it does not confirm a diagnosis. Understanding the timing, scope, and meaning of your results is an important part of informed pregnancy care.

If you are considering non-invasive prenatal screening or need help understanding your results, consult a gynae near you at Miracles Healthcare, Gurgaon, for personalized guidance and the right next steps.

Advanced Prenatal Screening with Expert Gynaecology Care in Gurgaon

Miracles Healthcare is a leading maternity and gynaecology hospital in Gurgaon, providing comprehensive, evidence-based care for expecting mothers and families since 2002. If you are considering a Non-Invasive Prenatal Screening Test (NIPT), our experienced gynaecology team can guide you on the right time for testing, what conditions NIPT screens for, and what your results may mean.

What sets us apart:

• 50+ Female Gynaecologists on board, providing expert care throughout pregnancy and for a wide range of women's health concerns.

• Trusted by 7 Lakh+ Patients, reflecting our commitment to patient-focused and compassionate healthcare.

• 24×7 In-House Diagnostic Facility for convenient and timely investigations during pregnancy.

• Comprehensive Maternity Care, supporting mothers from pregnancy planning and prenatal screening to delivery and postnatal care.

• 25,000+ Babies Delivered, reflecting the trust of thousands of families in our maternity and pregnancy care services.

• Multispeciality Support, providing access to specialists across different medical disciplines whenever required.

• Personalised Pregnancy Guidance, helping expecting parents understand screening options and the appropriate next steps based on their individual needs.

• Multilocation Presence across Gurgaon, making pregnancy and women's healthcare easily accessible.

  • Miracles Apollo Cradle, Sec 14, Gurgaon

  • Miracles Mediclinic, Sec 14, Gurgaon

  • Miracles Apollo Cradle/Spectra 82, Gurgaon

  • Miracles Mediclinic, Sec 56, Gurgaon

Planning to undergo an NIPT test or need help understanding your screening options? Book an appointment with a gynaecologist near you at Miracles Healthcare to understand the right timing for NIPT, what the test can detect, and what your results may mean. Get personalized prenatal guidance and comprehensive pregnancy care under one roof.

Written and Verified by:

Dr. Sadhna Sharma Exp: 20

MBBS, MD (Obs. &Gynae.)

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