A National Women's Health Policy was launched in Australia in 1989, and Australia became the only country to have a comprehensive policy on women's health. The policy is intended to provide a framework for decision-making in both mainstream and separate women's health services. The author examines the forces and factors that led to the formulation and adoption of the policy, then addresses the question of why Australia is alone in choosing a national policy as a focus for women's health action. A number of key influences, either absent or weaker in comparable countries, worked together to facilitate policy development. The activities of women working in a number of arenas coincided with the election of relatively supportive governments, creation of women's policy machinery in bureaucracies, employment of feminists in key positions, and opportunities for policy expansion afforded by federalism. These influences, within the Australian ideological context of strong support for social liberalism, account for the country's distinctive policy position.