Should babys be given DNA test upon birth even if couples are married?

It has been countless stories of men being told they are the father and it they end up not being the father. Even in marriages men have learned after the fact that they are not the father. Would it be reasonable to say all newborns shouldbe given a DNA test upon birth to speed up the process of establishing paternity? Maybe a woman had sex with someone else and got pregnant but was unaware that a child has been concieved, things like that can happen...listen in live and call in at 10pm Central 602-753-1987 and follow us on  twitter http://twitter.com/theWTFRADIOSHOW and our facebook page http://facebook.com/theWTFRADIOSHOW