How Harmony® prenatal test works
Getting the Harmony® prenatal test is easier than you might think
Three easy steps to clear answers
A simple blood test and a little patience. That’s all it takes.
At 10 weeks or later your blood is drawn.
Your blood sample is sent to a laboratory where it is analyzed.
Your results are sent to your healthcare provider.
Start with your physician
Ask your pregnancy care provider for the Harmony prenatal test, the most proven cfDNA-based prenatal test.*
Review the Expecting Parents Discussion Guide for ideas of questions you can ask your doctor about the Harmony prenatal test.
*Demonstrated by 80 peer-reviewed published studies using the Harmony prenatal test as of September 2025.
Data on file with Roche.
What to expect from your test result
Once the analysis is complete, your physician will share your results with you. It is important to remember that the Harmony prenatal test, like any screening test, does not provide a diagnosis. Most women receive a “low probability” result, meaning that the test did not find evidence of specific chromosome conditions. Some women receive a “high probability” result, meaning that a larger or smaller amount of DNA than expected from a specific chromosome was found. A “high probability” result does not necessarily mean that the fetus has a chromosome condition. A small proportion of women receive a report stating that a probability assessment could not be provided. These women may elect a second blood draw. All results should be discussed with a healthcare provider.
How much does the Harmony prenatal test cost?
Talk to your healthcare provider for information about the cost and access to the test.