An evidence-based guideline for unintended pregnancy prevention.

Despite the frequency of and significant costs related to unintended pregnancy, it has received less attention in research and prevention guidelines development than other important health threats. This lack of attention has resulted in a system-wide failure to provide care to reproductive aged women who are at risk of unintended pregnancy. An evidence-based blueprint for a coordinated system of primary, secondary, and tertiary prevention is proposed for health professionals who provide care for patients at risk for unintended pregnancy.