Should paternity tests be mandatory at birth?
Think how many problems this would solve! If a couple breaks up after the child is born, the father can't run from his responsibility. If the mother strayed, she can't put the wrong man on the hook. If the child ever needs bone marrow from the father, it could save a lot of time and pain down the road if the issue is cleared early.
DNA testing benefits children by providing them access to their actual paternal fathers and extended family. It gives them an accurate family medical history, thus allowing physicians to better treat acute illnesses and prevent or prepare for genetic illnesses and conditions. It allows them the opportunity to develop a relationship with their fathers who may otherwise not have been aware of them.