Non-invasive prenatal chromosome testing
Pregnant but worried about possible chromosome conditions? We offer the very latest in non-invasive prenatal testing which assesses the risks of conditions such as Down’s Syndrome.
Anyone can come to us for this test, whether you’ve had successful treatment with us, at another clinic, or have conceived naturally.
What is the Harmony prenatal test?
The new Harmony prenatal test is a simple, non-invasive blood test. Available from 10 weeks of pregnancy, it involves a sample of your blood being taken by our nurses at our clinic. This sample is then sent for analysis to a specialist laboratory in the United States where this test was developed.
The test determines the risk to your baby of various Trisomies - chromosome conditions caused by three copies of a particular chromosome instead of two. DNA circulates from your baby in your own blood during pregnancy, Harmony analyses this DNA via your own blood. It assesses the risks of:
- Trisomy 21 (Down’s Syndrome)
- Trisomy 18 (Edwards Syndrome)
- Trisomy 13 (Patau Syndrome)
- Sex chromosome conditions such as Turner Syndrome
How accurate is the result of the Harmony test?
Harmony is an early and highly-accurate test which unlike traditional testing such as amniocentesis or CVS carries no risk to your baby. Studies show it is over 99% accurate for assessing Down’s Syndrome risk. The false positive and false negative results are also significantly lower than traditional invasive testing methods with a combined false positive rate for Trisomy 21, 18 and 13 of just 0.15%.
How long does the test take and how much does it cost?
Your results will be available two weeks from testing, typically around the time you would go for your first trimester 12 week scan. The Harmony prenatal test is available for £495.
Deciding if the test is right for you
Harmony does not detect all fetal abnormalities. If your test result shows a high risk that your baby has a chromosome condition, it is not a definite diagnosis, although the accuracy of the Harmony test means it’s highly unlikely your test result would be inaccurate. In the event of a positive result, you’ll be referred back to your NHS care provider for follow-up testing.
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