04.11.12 Teen births fell again in the United States in 2010 with the highest rate once more in Mississippi, according to a new government report. Nearly every state saw a decline in teen births from 2007 to 2010, with the biggest drop in Arizona at 29 percent. Rates stayed about the same in three states: Montana, North Dakota and West Virginia.

The Centers for Disease Control and Prevention previously reported that U.S. births by mothers of all ages had dropped in 2010 for the third straight year. Experts think the economy is a factor.

The rate for teenage moms reached its lowest point since record-keeping began in 1940. The rate fell 9 percent to about 34 per 1,000 girls ages 15 through 19. The decline was seen among all racial and ethnic groups.