Menstruation, previously a hidden and ‘unspeakable’ physiological process, has become a topic of cultural interest and political activism evident in recent campaigns on period poverty. Yet coping with the menstrual cycle remains in large part individualised, falling within the remit of medical advice, limited educational interventions or commercial interests including digital tracking technologies. To date there are no sociological studies of menstrual ‘management’ in Ireland. Drawing on an intergenerational sample and using qualitative including visual methods, this thesis investigates how menstruation is navigated across and between generations of people who menstruate. Critical menstrual theories are used to explore how those who menstruate manage, frame and understand menstruation within Ireland's evolving social and political landscape. It investigates often unspoken and informal social practices of menstrual ‘management’ passed down through kinship and peer networks. Menstrual management is conceptualised as operating on three levels: at the subjective micro level of individual management, the meso level of kinship and peer dynamics and at the macro level of cultural, institutional, and commercial framings including technological management. These levels interact to produce a particular social imaginary, a set of values, institutions, and symbols through which menstruation is experienced, regulated, commodified, digitised and contested. I situate menstruation within the terrain of everyday experiences to assess it as a site of stigma but also of resistance. The aim is to understand menstruation within broader processes of gendered social change. The power of cross-generational dynamics in shaping how women and girls frame their embodiment, and their sexual and reproductive lives reveals much about the 'stickiness' of gendered norms, while also indicating sources of resistance, creativity, and gendered social change in Irish society. In doing so, the thesis contributes to sociological understandings of how embodied experiences and gendered subjectivities are socially produced, negotiated, and potentially transformed across generations.