How the culture has changed:
But the nation’s intense focus on teenage childbearing has obscured a more fundamental problem in childbearing trends. Last week, the CDC reported that about 40% of American children were born out of wedlock in 2007, more than triple the 11% who were in 1970. This means that more than 1.7 million children were born outside of marriage in 2007. Moreover, the vast majority of these babies -- 60%, to be precise -- were born not to teenagers but to women in their 20s (only 23% of nonmarital births were to teens). Furthermore, the CDC reports that nonmarital childbearing has been rising much faster among adults than among teenagers.
None of this should come as a surprise, given that a 2003 Gallup Survey found that 64% of young adults age 18 to 29 thought that having a baby out of wedlock was "morally acceptable."