According to the Rutgers University Marriage Project, the higher a woman's education level, the less likely it is that she will have children:
Women with four-year college degrees or better are more likely to be childless than women with lower levels of educational attainment. In 2006, for example, slightly more than twenty-four percent of women, 40 to 44 years of age, with a bachelor’s degree, and 27.4 percent of women, 40 to 44 years of age, with graduate or professional degrees were childless compared to only 14.9 percent of those without a high school degree.
Sources: Tim B. Heaton, Cardell K. Jacobson, Kimberlee Holland, “Persistence and Change in the Decision to Remain Childless,” Journal of Marriage and the Family 61 (1999), 531-39. 7; and Jane Lawler Dye, Fertility of American Women: 2006, Current Population Report P20- 558, Washington, D.C: US Census Bureau (2008): Table 2, 5.
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