The articles note that this is not true for college graduate moms, 92% of whom get married before they have their kids.
One detail struck me as interesting as much as a marker of the shifting class divide as of this demographic shift.
For a generation the most important class divide in America has been between those who only graduated from high school and those who went to college. Lately, though, some sociologists have argued that the big gap has shifted upward. Now the main cleavage is between those who graduated from college, and those who did not.
The new report supports this new place to draw the line. Child Trends, who conducted the study found that
The fastest growth [of out-of-wedlock births] in the last two decades has occurred among white women in their 20s who have some college education but no four-year degree.