Periodical, a new feature documentary from XTR and MSNBC Films, tells the unexpected story of the human body by exploring the marvel and mystery of the menstrual cycle, from first period to last. But this is not your middle school sex-ed class. Bringing you stories from soccer champion Megan Rapinoe who reveals how members of the U.S. Soccer team track their cycles when training for the Women’s World Cup (which they won), to scientists who are discovering the power and possibilities of stem cells found in period blood, to young activists flipping the bill on period tax one state at a time, we uncover the shocking truths, challenge taboos, and celebrate the untapped potential of this special nutrient-dense blood.

Through innovative mixed media storytelling, Periodical is for everyone who wants to know more about the menstrual cycle, and especially for those who don’t.