One in five mothers in America have children with different fathers, a new study shows. Researchers found that the trend was higher in minority groups and mothers with low income and education backgrounds. The data was taken over a 27-year period from nearly 4,000 U.S. women who had been interviewed more than 20 times. The study's author Cassandra Dorius said of the one in five figure: 'To put it in perspective, this is similar to the number of American adults with a college degree. It's pervasive.'
