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 ...