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Neo24 test results are usually available within 5 days of Juno receiving the sample of maternal blood (although up to 10 days may be required)

They are tests that are performed before the baby is born and in which the sample to be studied is not obtained directly from the foetus, but from its DNA that is found freely circulating in the mother’s blood, which is why it is non-invasive.

With this test we can detect the presence of certain abnormalities in any of the foetus’ 24 chromosomes. It detects anomalies like trisomies 21, 18 and 13 (Down, Edwards and Patau Syndromes) and the anomalies generated by the sex chromosomes (X and Y).

We take a blood sample from the mother and extract the foetus’ DNA that is circulating in it. The DNA is analysed and any chromosome abnormalities detected, associated with genetic disorders, are reported.

It can usually be performed from week 10 of pregnancy.

Yes. This test is for all pregnant women, whether they conceived using assisted reproduction treatment or naturally.

It does not replace them, because they are different types of test. In general terms, the Neo24 test is a screening test for patients with no previous abnormal findings related to their pregnancy. It is a non-invasive test, where neither the baby nor the placenta are sampled directly. In contrast, amniocentesis and chorionic villus sampling (CVS) are invasive, the former involves piercing the amniotic sac and removing a small sample of amniotic fluid containing foetal cells, while the latter removes cells from the placenta, which have associated risks for the pregnancy. The Neo24 test detects abnormalities in the number of chromosomes, not in their structure, whereas with amniocentesis and CVS a complete karyotype is obtained. Amniocentesis and CVS are used when a definitive result is necessary – for example, if an abnormality has been detected using a non-invasive test, or if abnormalities have been observed during an ultrasound examination. On the other hand, the Neo24 test can be performed from week 10, whereas for amniocentesis it is usual to wait until at least week 14 and CVS is not usually undertaken before week 11. In any case, your doctor will be able to explain which test is most appropriate in your case.

Yes, the test can be performed for twin pregnancies, although in such cases it is not always possible to detect abnormalities affecting the X and Y chromosomes.

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