DNA testing during pregnancy is something that must be addressed in this day and age.

The reasons why this test needs to be done are self explanatory, but if you do need to have one done, here is some information about getting a DNA test during pregnancy.

The only way this could be done in the past was to get blood or tissue samples from the baby in utero, and compare that DNA to the mother and alleged father’s DNA.

There are now several mail order companies claiming to be able to give paternity results by using fetal cells in the mother’s bloodstream.

In pregnancy, the fetal cells cross into the mother’s bloodstream ( as early as 5 weeks gestation) and can be detected in the mother’s blood sample. The cells are then separated from the maternal cells and are analyzed. Those results are then compared the the parents for results.

This sounds really promising right? Don’t jump on the bandwagon just yet.DNA testing during pregnancy

Many of these labs selling these non invasive test show scientific evidence and studies about maternal DNA, they fail to show actual proof of the reliability of the results. The fact is, separating the fetal cells from the maternal cells in difficult and there are commonly not enough of the cells to to an accurate test.

They will include studies that show that, yes, DNA can be extracted from maternal cells, but the information needed for paternity is not as reliable as they claim.

There are instances of these “DNA testing during pregnancy” tests being performed and being wrong. Once case the mother almost got an abortion because the results showed her partner was not the father.

Some of these labs are not licensed and therefore are not monitored.

While these tests may not be as reliable about maternity, they have been shown to be more reliable when it comes to diagnosing some Chromosomal abnormalities and even the sex of the baby.

For an accurate result for paternity, the invasive tests such as Chorionic Villus Sampling and amniocentesis are the standard.

These invasive tests are not recommended because of the risks of those tests. If a paternity test needs done, and one of those tests would need done for another medically necessary reason, then they could be both done at the same time without any additional risk.

The least invasive would be to get a blood sample, a buccal sample or even a sample from the umbilical cord blood.

These tests should be well thought over and discussed with your doctor.

At the time of this article, I have not found any reliable evidence about maternal dna testing, if you should find a study, please post your comments below! I’d love to know about any new studies.

http://www.newscientist.com/article/mg20827893.200-the-danger-of-unreliable-paternity-tests.html?full=true

http://www.ncbi.nlm.nih.gov/pubmed/20357733

http://www.nytimes.com/2008/10/07/health/research/07down.html?_r=1

http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(97)02174-0/abstract

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