Why the Abortion Rate Is Declining

Over the most recent decade for which data are available (2001–2011), the overall U.S. abortion rate, calculated as the annual number of abortions per 1,000 women of childbearing age (15 to 44), has dropped, continuing a trend that first appeared in 1980. The decline has been steeper since 1990, with a brief plateau in the middle of the past decade. The 2011 rate for the nation is the lowest since 1973.

Discussions of U.S. abortion trends must always be accompanied by caveats. The United States has an incomplete national abortion reporting system and what is published by government agencies is subject to wide variation regarding both content and time frames. The most comprehensive report, from the Guttmacher Institute, is not issued each year; is voluntary, like the national surveillance reports issued annually by the U.S. Centers for Disease Control; and is subject to omissions that, the authors acknowledge, make estimates necessary. Several U.S. jurisdictions with particularly permissive abortion laws, including California, Maryland, and New Hampshire, gather little or no official information.

Nonetheless, the overall direction of U.S. abortion practice is clear. A closer look at individual states that have consistent data confirms this trend…

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