The report by Michael New, an assistant professor of political science at the University of Alabama, revealed a correlation between the drop in the number of abortions in the United States and the rise in state regulation of abortion, including laws requiring informed consent, waiting periods and parental involvement.

Abortions in the United States declined by 22.2 percent between 1990 and 2005, according to a Centers for Disease Control and Prevention report. New said several factors might play a role in the decrease in abortions, but his research focused on the relation of two U.S. Supreme Court opinions to the decline -- Webster v. Reproductive Health Services (1989) and Planned Parenthood of Southeastern ...