 In 1935, Vergara joined with Elena Caffarena, Flora Heredia, Evangelina Matte, Graciela Mandujano, Aída Parada, Olga Poblete, , , and Clara Williams de Yunge to found the Pro-Emancipation Movement of Chilean Women (MEMCh).The organization would become one of the most important feminist organizations in Chile and focused on addressing the socio-economic, cultural and legal limitations for women.Vergara became the editor of the monthly bulletin of the organization, "La Mujer Nueva" (The New Woman), which published articles on various women's issues and information on international meetings and conferences.