Customer (name blocked for privacy),
Paternity testing that is done during pregnancy is either done if you are having an amniocentesis done, or chorionic villi sampling. An amnio is usually done between 16 and 20 weeks. However, this type of testing is only done if your doctor deems that you are at an increased risk for genetic and chormosomal problems, for one thing, because this test is invasive and carries a small risk of miscarriage. CVS is done between 11 and 12 weeks, though some testing centers will do it as late as 13 weeks. This test also is only really done if you are at increased risk. You can read more about this test here
http://www.babycenter.com/0_amniocentesis_327.bc
CVS involves taking a sample of tissue of cells from the placenta. You can read more about this test here
http://www.babycenter.com/0_chorionic-villus-sampling-cvs_328.bc
After birth paternity testing can be done by performing a simple mouth swab test.
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