Understanding NIPT — Non-Invasive Prenatal Testing Explained

Non-Invasive Prenatal Testing (NIPT), also known as cell-free DNA (cfDNA) screening, is one of the most significant advances in prenatal medicine in recent years. It allows detection of chromosomal abnormalities in the fetus with remarkable accuracy, using only a blood sample from the mother — no needles into the uterus, no risk to the baby.

What is NIPT?

During pregnancy, small fragments of fetal DNA circulate in the mother's blood. NIPT analyses these DNA fragments to assess the risk of certain chromosomal conditions. It is a screening test, not a diagnostic test — meaning a positive result requires confirmation through amniocentesis or CVS (chorionic villus sampling).

What Conditions Does NIPT Screen For?

• Down syndrome (Trisomy 21) — most common chromosomal condition
• Edwards syndrome (Trisomy 18)
• Patau syndrome (Trisomy 13)
• Sex chromosome abnormalities (Turner syndrome, Klinefelter syndrome)
• Microdeletion syndromes (in advanced NIPT panels)

Who Should Consider NIPT?

NIPT is recommended for:

• Women over 35 years of age (advanced maternal age)
• Women with abnormal first-trimester screening results
• Women with a personal or family history of chromosomal abnormalities
• Previous pregnancy affected by a chromosomal condition
• Any woman who desires comprehensive prenatal chromosome screening

NIPT vs. Traditional Screening

Traditional screening methods like the double marker test and triple marker test carry higher false-positive rates (around 5%), meaning many women are incorrectly identified as high-risk and undergo unnecessary invasive testing. NIPT's false-positive rate is below 0.1%, dramatically reducing unnecessary anxiety and invasive procedures.

Getting NIPT at The Fetal Medicine Clinic

We offer comprehensive NIPT panels with expert genetic counselling before and after testing. Our genetic counsellors help you understand your results and guide you through the next steps, ensuring you are never alone in this journey.