Prenatal genetic testing is used for many reasons, especially paternity testing and tests for genetic disorders, however how is this carried out? Prenatal genetic testing is performed primarily using two strategies, namely amniocentesis and CVS.
Genetic medicine clinic involves taking a sample of the amniotic fluid which surrounds the unborn fetus and testing the DNA within this fluid. The amniotic fluid includes cells that are shed from the body in the unborn baby naturally since it grows. These cells contain the actual baby’s DNA and so enable you to test for genetic disorders within the baby or to compare it to an alleged father's DNA to find if the father really is the father of a child. Prenatal genetic testing using amniocentesis is usually done during the second trimester in the pregnancy or after 2 or 3 weeks.
The second method employed in prenatal genetic testing can be CVS or chorionic villi trying. This is normally carried out between 10 and 12 weeks within the first trimester of the actual pregnancy and involves taking a small piece of the placenta consisting of chorionic villi to end up being tested. This contains cells in the baby and so may be used as a sample in the baby's DNA to examination for paternity or specific genetic disorders.
Both of such methods of prenatal genetic testing have certain pitfalls. The rate of problems involved may be relatively small but it is necessary for each mother or family unit to consider the risks involved and decide whether they would like to get the prenatal anatomical testing done and decide making use of their doctor what method they're going to use.