--- - |2 We examine efforts of feminist institutional activists in the 1960s and 1970s as they worked to gain U.S. federal policy to combat workplace pregnancy discrimination. The success of these activists in winning policy change provides a case that allows us to develop a theoretical understanding of how feminist institutional activists can succeed in winning policy change. We find that when institutional activists strategically shifted governmental arenas and adapted their mobilization and discursive strategies to these arenas, they were able to dismantle policy‐specific barriers that impeded their goals. In taking these steps, feminist institutional activists were successful in opening up both contingent and structural opportunities, which ultimately allowed them to gain the policy change they sought. - 'Sociological Forum, EarlyView. '