Non-invasive prenatal testing

Learn all about your baby's health

Non-invasive prenatal testing in Gijón, Asturias

What is a non-invasive prenatal test?

It is a non-invasive prenatal test that allows detection of the most common fetal chromosomal abnormalities. Only a blood sample from the mother is needed to analyze the DNA from the placenta.

What they consist of

Free DNA blood tests are tests that detect the presence of abnormalities of chromosomes 21, 18 and 13 (Down syndrome, Edwards and Patau) and the most common abnormalities generated by the sex chromosomes (X and Y).

Know your baby’s health

Free DNA testing in blood

At the forefront of genomic medicine technology


During pregnancy, DNA from the baby circulates in the mother’s bloodstream. Enormous advances in the field of genetics allow us for the first time to detect this fetal DNA in the mother’s blood and to access genetic information about the baby’s chromosomes.

Humans have 23 pairs of chromosomes, a total of 46 (two copies of each pair). The first 22 pairs are numbered from 1 to 22. The last pair determines the sex. Girls have two X chromosomes and boys have one X and one Y chromosome. Health and developmental problems occur when either chromosome is missing or extra.

The technique is as simple as drawing some blood from the mother when she is at least 10 weeks pregnant. This sample is analyzed and the results are received within 3-4 days.

Advantages of non-invasive tests

  • It is the most advanced method in non-invasive testing that allows early detection of some chromosomal abnormalities, since it can be performed from the 10th week of pregnancy.
  • It is an innovative test that allows to evaluate the risk of presenting the most frequent anomalies: Down syndrome (trisomy 21), Edwards syndrome (trisomy 18) and Patau syndrome (trisomy 13).
  • Sex chromosome analysis not only provides information on fetal sex, but also detects pathologies such as Turner’s syndrome (X monosomy) or Klinefelter’s syndrome (extra X chromosome, XXY).
  • Unlike other prenatal diagnostic tests, this test carries no risk to either the mother or the fetus.
  • It is an accurate technique, with detection rates of up to 99%, and false positive rates of less than 0.1% for the detection of trisomies 21 and 18.

Interpretation of results

The simplest studies have results available in 3 days, and are interpreted as follows:

  • Low risk: when there is more than a 99% chance that the baby will not have any of the chromosomal abnormalities listed.
  • High risk: your medical team will analyze your case and advise you to undergo an invasive prenatal diagnostic test to confirm the diagnosis (usually amniocentesis).
  • We have a team of expert geneticists who will offer you genetic counseling for any result.
  • We have a team of expert geneticists who will offer you genetic counseling for any result.
  • We have a team of expert geneticists who will offer you genetic counseling for any result.

The result is expressed as a percentage of risk, ranging from 0.01% to 99%.

For whom it is indicated

This test is generally advised if:

  • If you want to know as much information as possible about your baby’s health.
  • Your maternal age is advanced (over 38 years old).
  • Your risk index for Down syndrome is elevated.
  • You have other risk factors for fetal chromosomal abnormality.
  • You have had a previous pregnancy with alteration.
  • You have a history of first trimester abortions.
  • You have undergone in vitro fertilization treatment with preimplantation genetic diagnosis.
  • You have undergone in vitro fertilization treatment and your partner’s semen was pathological.

Before performing one test or another, our medical team will advise you on which is the most appropriate for you depending on your background and your particular situation.

The test can be performed from the 10th week of pregnancy.

Why do it at Clínica ERGO

Whether you have achieved your pregnancy through assisted reproduction or natural pregnancy, we will give you the best service, because we understand how important these moments are for you.


  • Our team specialized in genetics offers you all the information you need about genetic diseases and the best advice on the results obtained in the test.
  • We have an expert committee that meets weekly to evaluate each case on a personalized basis and establish the guidelines to be followed.
  • We are at the forefront of technology in genomic medicine from the embryonic stage and we are one of the first private gynecological centers to incorporate a Medical Genetics Unit.
  • Both the counseling prior to sample collection and the indications after the results are included in the price of the test.
  • Some private medical insurance companies offer these tests free of charge to their policyholders. Call us and we will inform you.

True stories

“After several embryo transfers, we finally got pregnant. I wanted to enjoy the pregnancy with peace of mind and in 4 days we had the result. Everything was fine and I was calm”. GFR, 36 years old. Gijón

“I did it in my second pregnancy because they are much cheaper now, and besides knowing that everything was fine, we knew very early on that it would be another girl.” AAI, 30 years. Oviedo

“They told me that because of my age I didn’t need to do it because I was at low risk, but I wanted to stay calm. They took my blood on a Monday afternoon and on Friday morning we knew that David was on his way and healthy”. MBD, 41 years old. Ribadeo

Our confidence tests

There is a test for each case:

NACE test – Igenomix (analysis of chromosomes 13, 18, 21, X and Y). Down syndrome, Edwards’ syndrome, Patau’s syndrome, Monosomy X (Turner’s syndrome), and fetal sex.

NACE 24 test – Igenomix (analysis of the total of 24 chromosomes, identifying important genetic syndromes derived from an extensive search for deletions and duplications).

Don’t think about it, stay calm and enjoy your pregnancy from week 10.

Need more information?

We are a team of more than 15 professionals specialized in assisted reproduction and women’s health. Do you have any doubts? We invite you to meet us, your first visit is totally FREE.

Aida Navas Sierra