About 50% of pregnancies in the U.S. are unintended and are higher among adolescents and young women, minorities and women with less educational and financial resources.  Thus strategies to prevent unintended pregnancies include assisting women at risk in choosing appropriate contraceptive methods and helping women use those methods properly and consistently.  A new report prepared by the National Center for Chronic Disease Prevention and Health Promotion is now available and addresses sometimes controversial or complex issues regarding specific contraceptive methods.    They utilize recommendations originally made by the World Health Organization but they have been tailored more specifically to the U.S.