This article analyses how the Quebec Christian feminist collective, L’autre Parole, has treated maternity in its eponymous journal since 1976. It shows how Mary and the idea of a feminine vocation, both framed by the Catholic Magisterium as maternal by essence, are contested and deconstructed by L’autre Parole. This collective has developed an alternative discourse to Catholic teachings on the woman, in which motherhood (biological or spiritual) is elevated as the exclusive and ultimate horizon and vocation of a woman. An analysis of the collective’s discourse and symbolic practices related to issues surrounding maternity (abortion, new reproductive technologies, and activists’ mothers-daughters relationships) illustrates the evolution of the radical and materialist feminist stance. Without losing sight of conceptual tools like gender relations and collective ownership of women, it integrates eco-feminist thought and adopts a non-hierarchical perspective with respect to life and the defence of women’s rights.