The percentage of the women and girls (ages 15-49 who had a menstrual period with the last year) who used menstrual materials such as sanitary pads, tampons, menstrual cups, cloth, or cotton wool, to capture and contain menstrual blood during their last menstrual period. Those who used paper, underwear alone, or nothing are not classified as using menstrual materials. Development relevance: While menstruation can be a taboo topic, menstrual health has been recognized as essential to improve public health and advance gender equality and human rights. Menstrual health is central to achieving multiple Sustainable Development Goals (SDGs), and is directly linked to SDG target 6.2, which calls for ‘special attention to the needs of women and girls’. Limitations and exceptions: The JMP does not currently use a service ladder for menstrual health, as norms and standards relating to menstrual health and associated water, sanitation, and hygiene needs are still evolving. Further work is needed to refine the menstrual health indicators and evaluate if others may be more relevant. National data are not available for high-income countries. Statistical concept and methodology: Data on menstrual health are produced by the WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (JMP) based on household surveys. The data on each of the menstrual health indicators have been compiled and harmonized across countries and surveys, to the extent possible, to support cross-country comparison.