This Proceedings document describes a workshop held to discuss the progress of the 12 epidemiologic studies funded as a result of the interagency collaboration. The workshop was held as a special symposium in conjunction with the e.hormone2004 Conference organized by the Center for Bioenvironmental Research at Tulane and Xavier Universities on October 30, 2004. The study investigators shared their research findings regarding the association of reproductive, developmental, cancer, and other endocrine effects with exposure to toxic hazards in the environment. The meeting culminated with a panel discussion on the Translation of Research Into Public Health Practice and Policy. The panel discussion provided the opportunity to present and discuss different challenges in translating and applying the results of research to public health practice and policy. Panelists offered brief perspectives related to state and local regulatory decisions/practices, economic analyses, legal deliberations/actions, and public health promotions and interventions. This Proceedings includes the agenda for the symposium, summaries of the progress of the 12 epidemiology studies, responses to questions posed to the panelists before the workshop, a summary of the panel discussion, and biographical sketches for all of the presenters and panelists.