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Paternity Testing Samples for DNA Testing<br />
Paternity Testing Samples for DNA Testing<br />If you are faced with the dilemma of having to determine the paternity of a child, there are a lot of factors to take into consideration. Obviously, cost is a factor as well as which service to utilize for the paternity testing. But I would like to focus today on how the genetic samples are collected. There are several different methods of collecting paternity testing samples. Some of the methods are minimally invasive, while other methods require the consent and intervention of a physician.<br />
Prenatal Paternity Testing<br />As I mentioned earlier, some paternity testing methods require a physician. Both methods of prenatal paternity testing will require the consent of a physician (preferably the attending obstetrician, so that they are fully aware of the procedure and it’s possible effects on the developing baby). A physician also has to physically perform either of the prenatal genetic sampling procedures.<br />Chorionic Villus Sampling – (CVS): This type of sampling can be performed fairly early during the pregnancy. It’s possible to collect the sample as early as the 10th week of the pregnancy up till the 13th week of the pregnancy. This coincides with the final weeks of the first trimester. Chorionic Villi (villi being the plural of villus) are the small finger shaped growths that are found in the developing placenta. Since the placenta and the developing child develop from the same embryo, they share the same genetic material. The physician places a needle or catheter (thin tube) into vagina and through the cervix. Ultrasound helps to guide the needle or catheter into the correct position.<br />Amniocentesis : As an unborn child develops, amniotic fluid surrounds the developing baby. The amniotic fluid contains cells from the growing child. For paternity testing, amniocentesis is generally performed during the second trimester between the 14th to 20th weeks of pregnancy. In Amniocentesis, a long thin needle is inserted through the abdomen into the uterus. It is also an ultrasound guided procedure. A sample of the amniotic fluid is aspirated and collected in a sterile container.<br />With both Amniocentesis and Chorionic Villus sampling, there is a chance for risk to both the mother and child. That is why it is imperative to discuss prenatal paternity testing with the attending obstetrician.<br />
Postnatal Paternity Testing<br />There are three standard methods of collecting DNA samples for postnatal paternity testing. Luckily, all three are much less invasive than the two methods of prenatal DNA sample collection.<br />Umbilical Cord Testing: When the child is born, if a collection kit is on hand, a DNA sample can be drawn from the umbilical cord. This requires a level of coordination with the testing company (in order to have the collection kit) as well as the hospital staff. The upside is that it is not at all invasive for the child.<br />Venipuncture: Most people are familiar with the process of drawing a blood sample. The blood is drawn from a vein via a syringe or vacuum tube and sent to the laboratory of choice for testing. It’s generally not difficult to collect a venous sample from the adult male that is being tested for paternity. However, it can be quite difficult and traumatic to collect a sample from a baby or a small child.<br />Buccal Swab Collection: It might be hard to imagine that you can get a DNA sample just from rubbing a swab on the inside of someone’s cheek. But that is exactly what a Buccal Swab is. A special swab (from the DNA testing company) is rubbed on the inside of the cheek and sent in for testing. Buccal Swab Collections are the least invasive form of sample testing commonly used by paternity testing laboratories.<br />
Paternity Testing Facts<br />When deciding on which paternity testing laboratory to work with, be sure to ask which sample collection methods that they utilize for their DNA testing. Not all laboratories may offer all of the previously mentioned collection methods.<br />