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Underlying all this may be the economy, which was in recession from December 2007 until June 2009. Even well afterward, polls showed most Americans remained worried about anemic hiring, a depressed housing market and other problems.

You might think a bad economy would lead to more abortions by women who are struggling. However, John Santelli, a Columbia University professor of population and family health, said: “The economy seems to be having a fundamental effect on pregnancies, not abortions.”

More findings from the CDC:

— The majority of abortions are performed by the eighth week of pregnancy, when the fetus is about the size of a lima bean.

— White women had the lowest abortion rate, at about 8.5 per 1,000 women of child-bearing age; the rate for black women was about four times that. The rate for Hispanic women was about 19 per 1,000.

— About 85 percent of those who got abortions were unmarried.

— The CDC identified 12 abortion-related deaths in 2009.