PATIENT TOOL
NIPT Result Interpreter
Understand what a high-risk or low-risk NIPT (cfDNA) result actually means for your pregnancy — in plain words, with real numbers.
In brief — the direct answer
A high-risk NIPT result is a screening result, not a diagnosis. Because NIPT is highly sensitive but chromosomal conditions are rare, many high-risk results are false alarms — the actual probability depends on your age and the condition screened. Only a diagnostic test (CVS or amniocentesis) can confirm. Enter your age and the screened condition to see your estimated probability.
Enter your result details
Age changes the starting probability, which changes what a result means.
Estimates assume a singleton pregnancy and typical assay performance. Your laboratory report may state its own risk figure — bring it to your appointment; we interpret both together.
Why so many high-risk results are false alarms
- NIPT is a screening test: it reads placental DNA fragments in maternal blood, which usually — but not always — match the baby.
- These conditions are rare. Even with a >99% accurate test, a small false-positive rate applied to a large healthy population produces many false alarms.
- The rarer the condition at your age, the lower the chance a high-risk result is real — which is why age changes the interpretation.
- Placental mosaicism, a vanishing twin, or your own DNA can all produce a high-risk result when the baby is unaffected.
What happens next
- Specialist review within days: we read the actual lab report, check for technical flags, and review your ultrasound findings.
- Diagnostic testing gives the definitive answer: CVS (from 11 weeks) or amniocentesis (from 15–16 weeks) — both performed here under continuous ultrasound guidance.
- Most families leave with certainty within one to two weeks — and most high-risk screens we review end in reassuring news.
Keep exploring
Clinical basis
- Gil MM, et al. Analysis of cell-free DNA in maternal blood in screening for aneuploidies: updated meta-analysis. Ultrasound Obstet Gynecol. 2017.
- Snijders RJM, et al. Maternal age- and gestation-specific risk for trisomy 21. Ultrasound Obstet Gynecol. 1999.
- Benn P, et al. Position statement from the Chromosome Abnormality Screening Committee on non-invasive prenatal testing. Prenat Diagn. 2015.
Want a specialist to review this with you?
This tool provides general guidance only and does not replace clinical assessment. Our maternal-fetal medicine team reviews cases urgently in Abu Dhabi and Al Ain.