Background: A lack of adequate guidance on menstrual management; water, disposal, and private changing facilities; and sanitary hygiene materials in low- and middle-income countries leaves schoolgirls with limited options for healthy personal hygiene during monthly menses. While a plethora of observational studies have described how menstrual hygiene management (MHM) barriers in school impact girls' dignity, well-being, and engagement in school activities, studies have yet to confirm if inadequate information and facilities for MHM significantly affects quantifiable school and health outcomes influencing girls' life chances. Evidence on these hard outcomes will take time to accrue; however, a current lack of standardized methods, tools, and research funding is hampering progress and must be addressed. Objectives: Compile research priorities for MHM and types of research methods that can be used. Results: In this article, we highlight the current knowledge gaps in school-aged girls' MHM research, and identify opportunities for addressing the dearth of hard evidence limiting the ability of governments, donors, and other agencies to appropriately target resources. We outline a series of research priorities and methodologies that were drawn from an expert panel to address global priorities for MHM in schools for the next 10 years. Conclusions: A strong evidence base for different settings, standardized definitions regarding MHM outcomes, improved study designs and methodologies, and the creation of an MHM research consortia to focus attention on this neglected global issue.

Purpose Despite the importance of menstrual health and hygiene (MHH) for adolescent girls' health, education, and gender equality, few countries monitor MHH. MHH needs remain underprioritized, and progress achieved through policies, programs, or investments go unmeasured. This article reports the systematic development of an indicator shortlist to monitor adolescent girls' MHH at the national and global levels across low- and middle-income countries. Methods A core group of MHH researchers and practitioners collaborated with stakeholders from three countries with demonstrated commitment to monitoring MHH (Bangladesh, Kenya, and the Philippines), measures experts, and a global advisory group. The approach included the following: (1) define domains for monitoring MHH; (2) review and map existing indicators and measures; (3) iteratively shortlist indicators through appraising quality, feasibility, and stakeholder input; and (4) refine the shortlist and develop guidance for use. Results The shortlist comprises 21 indicators across seven domains covering menstrual materials, water, sanitation, and hygiene facilities, knowledge, discomforts and disorders, supportive social environments, menstrual health impacts, and policies. Indicators are accompanied by measures that have been tested or are expected to provide reliable data, alongside justification for their selection and guidance for use. Discussion The shortlisted indicators reflect the multisectoral collaboration necessary for ensuring girls' MHH. Uptake requires integration into monitoring systems at national and global levels. Future work remains to evaluate the performance of the indicators over time and to support their widespread use. Governments and stakeholders can use these indicators to track the progress of programs and policies, monitor unmet MHH needs, identify disparities, and set targets for improvement.