Action on menstrual health and hygiene (MHH) and sexual and reproductive health and rights (SRHR), while often implemented as separate or distinct initiatives, need to be integrated, as this can be a compelling pathway towards gender equality. Integrating MHH and SRHR can: 1) Strengthen understanding of shared biological processes, sexual and reproductive health events across the life course; 2) Harness efforts to address shared social determinants that adversely affect outcomes, and amplify beneficial multi-sectoral actions; 3) Leverage programmatic similarities to enable positive outcomes for all, across the life course, and at scale; 4) Advance achievement of common goals related to health and wellbeing, education, water and sanitation, and gender equality and rights.