‘The biological characteristics that define humans as female or male.’ (GPE and UNGEI, 2017: 3).
GPE (Global Partnership for Education), UNGEI (United Nations Girls’ Education Initiative). 2017. Guidance for Developing Gender-Responsive Education Sector Plans. Washington D.C.: The Global Partnership for Education. Retrieved from: https://www.globalpartnership.org/content/guidance-developing-gender-responsive-education-sector-plans