The development of welfare policies aimed at mothers and children has been deeply influenced by women’s agency. This article explores the role played by Italian women politicians in the passing of the 1950 law on maternity rights. It examines the campaigns conducted by both left-wing and Catholic women,1 and discusses the arguments and strategies they used to ensure that this gendered issue was on the political agenda. Particular attention is given to the parliamentary history of this legislation. While the law was being debated antagonism between the parties was at its height, and competition between the opposing women’s organisations was fierce. Despite this, at a parliamentary level cross-party collaboration between women politicians was possible on this specific issue and was a crucial factor in the law being passed.