One of the most pervasive and common forms of gender discrimination experienced daily by girls and women around the world is their inadequate access to private toilets, according to a new paper by researchers at Columbia Mailman School of Public Health and colleagues at the International Rescue Committee. Despite the rise of advocacy and research efforts, they write, far too little has been done globally to improve the actual design, guidelines, and placement of toilets for girls and women. The paper is published online in a special issue on Water, Sanitation, and Hygiene in Humanitarian Contexts in the open-access journal Water.