Children typically live without both parents when their parents are divorced or did not marry. More than 1/3 of all first marriages end in divorce, and 60 percent of divorcing couples have children. More than 1/3 of all births are to unmarried women.

Sources:

1 National Viva Statistics Reports, Volume 56, Number 21, Births, Marriages, Divorces, and Deaths: Provisional Data for 2007 (July 14, 2008)

2  Jane Lawler Dye. (2005). “Fertility of American Women: June 2004.” Current Population Report, P20-555, Washington, DC: US Census Bureau.