From the Associated Press:

55 percent of mothers are between the ages of 15 and 44.

81 percent of women between the ages of 40 and 44 are mothers. In 1976, 90 percent of women in that age group were mothers.

94.1 births per 1,000 is the number of births in Utah in 2006, the nation's highest. Vermont was the lowest with 52.2. West Virginia's was 58.3

10.4 million single mothers live with children younger than 18, up from 3.4 million in 1970.

83 percent of mothers who went back to work within a year of their child's birth returned to the same employer.

5.6 million is the number of stay-at-home moms in 2006.