WaterAid Youth Ambassador Vivian Onano weighs in on menstrual taboos, girls’ education and more on International Women’s Day.

Your period. Aunt Flow. That time of the month. Whatever you call it, menstruation is a reality for women and girls around the world.

The average women will menstruate once a month, for roughly 35 to 40 years of her life. That’s approximately 3000 days—more than 8 years—of periods during her lifetime. At any given time, 800 million women and youth worldwide are menstruating.