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There are two basic types of DNA testing that can be done before delivery. These include amniocentesis and CVS, or Chorionic Villus Sampling. An amniocentesis is generally performed during the second trimester of pregnancy. Typically, it would take place between the 14th and the 20th week of pregnancy.
There is a prenatal paternity test that can be done while the mother is still pregnant. This new form of testing is also safer than old methods. How soon can a baby be given a DNA test? Even if the child is one day old, the cotton swab test can be done.