This latest issue of Frontiers of CLTS looks at the often taboo subject of menstrual hygiene. Menstruation is a core element of sanitation and hygiene affecting half of the world’s population for a large proportion of their lives. This issue shows how Community-led Total Sanitation (CLTS) programmes can address menstrual hygiene management in schools and communities to alleviate these stresses on women and girls. It shares learning, recommendations, innovations and experiences from Plan International, WaterAid, WSSCC, UNICEF, WASH United, Grow and Know and USAID/WASHplus.