Globally, 52% of women and girls are of reproductive age – around 1.9 billion people. Yet, a massive taboo and stigma still surrounds the topic of menstruation, and it is often difficult for girls and women in many countries and regions to practice optimal menstrual hygiene. WHO/Europe has been working with Member States to better understand the magnitude of the problem and to support the development of policies to tackle the inequality surrounding menstrual hygiene management (MHM).