Fertility of American Women: 2008
In 2008, there were 425,000 mothers at birth living in cohabitational relationships. These mothers made up 28 percent of births to women who were not married, who were separated, or married but with an absent spouse. (Census Bureau, 2008). The large sample size of the ACS (3 million households) made it possible to analyze fertility characteristics on a state-by-state basis. The report provides estimates of cumulative fertility, completed fertility, and current fertility by citizenship and employment status, as well as geographic differences in fertility.
Dye, J. L. (2008). Fertility of American Women: 2008 (PDF, 909 KB). (Census Bureau: Current Population Reports, P20-563).