The Centers for Disease Control and Prevention said the number of births among girls in this age group dropped 38 percent from 1994 to 2002 alone, even though the number of girls 10 to 14 climbed 16 percent during the same period. CDC researchers attributed the decline to sex education.
"The message is getting across to them. Teens are behaving more responsibly when it comes to sex," said Fay Menacker, at the CDC's National Center for Health Statistics.
The birth rate among girls this young has been declining since 1994, when 12,901 babies were born to mothers ages 10 to 14.