Something that's been posted on the NG forums, and I thought I'd share it here. According to this study around 10% of children aren't really fathered by who they think. It's pretty mind-blowing TBH...
http://www.canadiancrc.com/Newspaper_Articles/Globe_and_Mail_Moms_Little_secret_14DEC02.aspx
PS - wrong forum, please move to molestar's if possible