In the last decade there has been growing attention to challenges linked to maintaining menstrual health and hygiene (MHH). Results suggest that poor MHH has been associated with increased risk of urogenital infections, high levels of shame, depression, pain and other adverse social outcomes, such as school participation, performance among other. In this lecture, you will learn why MHH matters, and hear from two speakers sharing research examples in Nepal and Uganda which highlights how interventions can impact girls and women's lives.