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With non invasive prenatal DNA testing there are no risks [link widoczny dla zalogowanych] entailed because scientists can successfully work with the baby DNA found in [link widoczny dla zalogowanych] the mum’s blood. This test does not [link widoczny dla zalogowanych] even require the assistance of a medical specialist because the blood is not taken from inside the womb. All [link widoczny dla zalogowanych] that is needed is a blood draw from the median cubital vein, the [link widoczny dla zalogowanych] vein which runs across the back of your arm. This test is totally risk free, takes far less times, [link widoczny dla zalogowanych] and has no side effects.
What are the advantages?
Over the past few years, scientists have managed to extract fetal DNA from blood samples taken from expectant mums. This is being referred to as non invasive prenatal DNA testing and is [link widoczny dla zalogowanych] successfully being used to determine paternity of unborn babies as well as to [link widoczny dla zalogowanych] determine their genetic health (in other words to know whether the baby is carrier of any hereditary illnesses in its genes).
To understand the advantages of non [link widoczny dla zalogowanych] invasive prenatal paternity testing we must first understand the nature of other invasive sampling methods so as to be able to juxtapose the two and highlight the benefits of one over the other. Fetal DNA sampling using invasive sampling methods include amniocentesis and Chorionic villus sampling. Without going into too much detail, both these test involve insertion of needles into the womb in order to extract samples of fetal DNA. The samples extracted are very different- as amniocentesis suggests, it is a sample of amniotic fluid that is collected with this method. With chorionic villus sampling, it is a [link widoczny dla zalogowanych] sample (or sometimes a biopsy) of chorionic villi. Because these two tests require the OBGYN to get the needle very near the baby, a small error or miscalculation means the baby’s limbs [link widoczny dla zalogowanych] might be permanently damaged or the stress on the baby might cause a miscarriage.
How does [link widoczny dla zalogowanych] fetal DNA end up in the mother’s blood?
The constant exchange of nutrients and gasses between mother and child means that naturally dead fetal cells find [link widoczny dla zalogowanych] their way into the maternal blood. There is some very advanced laboratory analysis involved [link widoczny dla zalogowanych] which makes it possible to analyze the baby DNA in the mother’s blood. When testing for paternity, the prenatal test provides highly accurate results of 99.9%. With regards to testing in pregnancy for genetic health, the test is still not available direct to consumer [link widoczny dla zalogowanych] although there are very few labs that are offering it.