DNA Relationship How is the DNA sample collected? DNA is collected by rubbing a brush gently inside the mouth against the cheek for 15 seconds. The collection is safe and painless and can be performed on individuals at any age, including infants. DNA Relationship Tests Confirm familial relationships with paternity, maternity, sibling, grandparent, cousin, and aunt/uncle tests. Web apps are available to users who have taken the test. Get Test Already took the test? Sign in to access your results. Log In Can testing be performed before a child is born? How old does a child need to be before testing?