Non Invasive Prenatal Paternity Testing: Fetal DNA in Blood

The non invasive prenatal paternity test has made it possible to do determine paternity of an unborn child by analyzing a sample of maternal blood and a DNA sample of the alleged father. The test is already available direct to consumer. The main advantage of this test over other invasive sampling methods such as amniocentesis is that it is 100% risk free.

Scientists have also managed to successfully test fetal DNA in maternal blood and determine any autoimmune and genetic disorders that the unborn child may be suffering from. Fetal genetic testing for predisposition to disease from maternal blood samples has still not been made available on the market.

Fetal DNA Fragments

By isolating fetal DNA from the maternal blood using highly advanced state of the art technology, and comparing it to the paternal DNA of the alleged father through the analysis of over 300,000 genetic markers, it is possible to establish paternity in the prenatal stage beyond reasonable doubt. This test is the most accurate non-invasive prenatal paternity testing technique available offering accuracy greater than 99.9% accurate results.

The test can be carried out at any time after 10 weeks commencing from the last menstrual cycle or LMP. Prior to 10 weeks, the DNA accumulated in the mother’s blood will be insufficient for the test.

If you wish to make you calculations from the day of conception you will need to know the date of your last menstrual period-  this will likely have taken place within two weeks of your last menstrual period, when you are at your most fertile and thus, likely to conceive.

Collecting the Blood Samples

The test requires blood samples. A kit will be sent to the client containing blood collection tubes. This is not a home kit or a self-sampling kit. You need to go to a nurse or doctor to have the blood samples taken. Blood samples will be required from the alleged father and expectant mother. This test can only be done with a medical blood draw and thus, there is no chance of using any other type of DNA sample.

Reasons for Prenatal Paternity Testing

There are many reasons for wanting to establish paternity prior to the birth of a child, and a non invasive test is by far the safest as it means avoiding any risk of potential miscarriage, damage to the limbs of the child and leakage of the amniotic fluid that invasive prenatal fetal sampling techniques can cause. The cost of such a prenatal test is rather high but it still works out as being more cost effective and straightforward than amniocentesis or chorionic villus sampling.