Paternity tests - how do they work?

http://nma.tv Justin Bieber will soon take a paternity test to prove he is not the father of a 4-month old baby. What will this test entail? There are several ways to do a postnatal test, the most common by cheek cell testing, and the second most common is a blood test. For prenatal testing, the process is more invasive. Amniocentesis involves a long needle piercing through the abdomen to collect amniotic fluid. CVS (chorionic villus sampling) involves putting a thin tube or needle through the cervix to collect chorionic villi attached to the uterine wall, which contains the same genetic material as the fetus. For cheek cell testing, home kits are available online or through a drugstore. Both types of tests require sending samples to a lab. So you can have your own discreet test without having to be a guest on Maury Povich, unless you want the extra attention!