Prenatal testing non-invasive

This test uses the fetus’s free-floating DNA in the mother’s blood to identify the father of a child.

It has been known for over 20 years that the fetus’s DNA was present in the mother’s blood. The problem with doing a DNA test with it was you get so much of the mother’s DNA you could not see the fetus DNA. Many unaccredited companies even sold a test saying they could do this testing when they could not, because it was known that it may be possible. They were literally trying to do a DNA test trying to find shadows.

Natera Inc. of California finally figured out a way to do the testing. Rather than using PCR, or RFLP types of normal paternity testing, they used something called SNP. SNP DNA testing has been the new hype about trying to figure out where your DNA roots are from to, what diseases you will have.

The problem with the testing is you needed to do a lot of different DNA locations to get an accurate answer. For the prenatal testing, Natera has decided 318,000 different tested locations will provide an accurate answer. We must say that we agree.

This test guarantees an accuracy of 99.9%. This extremely new technology does have its limitations however.

If it is possible both alleged fathers are brothers, both alleged fathers must give samples for the test to be accurate.

If you are from a genetically secluded region, such as a small tribe in Africa, or a secluded village in northern Alaska, all potential fathers must be tested.

There is a small chance there will not be enough of the fetus’s sample in the mother’s blood to perform the test. In these cases there is no extra charge for retesting the sample, but there will be a charge to redraw the blood at the hospital, and for shipping. This usually happens very early in the pregnancy, after 9-10 weeks this problem decreases.