Clear answers to the questions that matter

You need accurate information. The Harmony test is more accurate than traditional first trimester screening tests as demonstrated by a landmark head-to-head comparison study in over 15,000 pregnancies.2

Fewer false alarms

You want reliable information. With the Harmony test, fewer than 1 in 1000 pregnant women will receive a positive result for trisomy 21 (Down syndrome) in an unaffected pregnancy.3 With traditional first trimester screening, 1 in every 20 results is a false positive, 2 which can lead to anxiety and unnecessary invasive procedures.

Proven by clinical evidence.

You want results that you and your doctor can trust. Doctors look for clinical studies and evidence before recommending a test. The Harmony test has been used in more than 1.4 million pregnancies in more than 100 countries.4 It is the most proven cell-free DNA prenatal test available, and is superior to traditional first trimester screening in both high and average-risk populations for trisomy 21.2


  1. Demonstrated by 59 peer-reviewed published studies using the Harmony prenatal test as of January 2019.
  2. Norton et al. New England J of Medicine. 2015; 372(17):1589-1597.
  3. Stokowski et al. Prenatal Diagn. 2015; 35:1243-1246.
  4. Data on file.

The Harmony Prenatal Test is a non-invasive prenatal test (NIPT) based on cell-free DNA analysis and is considered a prenatal screening test, not a diagnostic test. Harmony does not screen for potential chromosomal or genetic conditions other than those expressly identified here. All women should discuss their results with their healthcare provider, who can recommend confirmatory, diagnostic testing where appropriate. The Harmony Prenatal Test was developed, and its performance characteristics determined by Ariosa Diagnostics, Inc., a CLIA-certified and CAP-accredited clinical laboratory in San Jose, CA USA. This testing service has not been cleared or approved by the US FDA.

HARMONY is a trademark of Roche. All other product names and trademarks are the property of their respective owners.



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