Harmony prenatal test

Harmony is a screening test that is more accurate than traditional screening tests for trisomy 21 (Down’s syndrome).1

During pregnancy, your blood contains fragments of your developing baby’s DNA. The Harmony non-invasive prenatal test analyses this DNA in a blood sample from you to predict the probability of trisomy 21 (Down’s syndrome), as well as trisomies 18 and 13, in the pregnancy.1,2 These types of tests may be referred to as non-invasive prenatal tests or cell-free DNA tests.

With Harmony, there is a lower chance that your doctor will recommend follow-up testing, such as amniocentesis.3

Clinical tests show that the Harmony Prenatal Test will detect approximately 99% of cases of trisomy 21 (Down’s syndrome).1

Slightly less than 1 in 1,000 women might have a false positive test result with Harmony. This is at least 50 times lower than traditional screening tests.1

In a small percentage of women, a result from a non-invasive prenatal test may not be obtained. This is most often due to not enough of the baby’s DNA being present in the mothers bloodstream.1


1 in 20  or the equivalent of  50 in 1000 might have a false positive result

1in20 infographic

1 in 1000   might have a false positive result

1in1000 infographic

  1. Norton et al. N Engl J Med. 2015 Apr 23;372(17):1589-97
  2. Nicolaides et al. Am J Obstet Gynecol. 2012 Nov;207(5):374.e1-6.
  3. Wax et al. J Clin Ultrasound 2015 Jan; 43(1):1-6.