Aug. 20, 2008 -- Motherhood sure has changed in the past 30 years.

Today, U.S. women are having fewer babies, and more women are choosing to be childless.

A new report looking at state-by-state information from the U.S. Census Bureau paints a changing landscape of motherhood today when compared to the 1970s.

Consider this: 20% of women today aged 40 to 44 have no children. That percentage is double what it was 30 years ago.

The data are from the Census Bureau's 2006 American Community Survey and the Current Population Survey.

The surveys aimed to discover how many children are being born, to whom, and what the fertility rates are around the country.

Women aged 15 to 50 were surveyed about fertility between 2005 and 2006