US births break record; 40 pct out-of-wedlock

Story here. Excerpt:

'The birth rate rose slightly for women of all ages, and births to unwed mothers reached an all-time high of about 40 percent, continuing a trend that started years ago. More than three-quarters of these women were 20 or older.

For a variety of reasons, it's become more acceptable for women to have babies without a husband, said Duke University's S. Philip Morgan, a leading fertility researcher.
...
Cultural attitudes may be a more likely explanation. Morgan noted the pregnancy of Bristol Palin, the unmarried teen daughter of former GOP vice presidential candidate Sarah Palin. The young woman had a baby boy in December, and plans for a wedding with the father, Levi Johnston, were scrapped.

"She's the poster child for what you do when you get pregnant now," Morgan said.'