Periods. It’s not a favorite topic for most women but we have periods, also known as a menstrual cycle, for a reason.  Yes, it does waste nutrients are body can use. Yes, periods are physically inconvenient at times,but the menstrual cycles are one of the most biological benefits our bodies offer. We are one of the few mammals here on Earth who menstruate. Learn why this biological process is critical to the health and wellness of women. This TED-Ed video is an excellent on learning about the history and evolution of menstruation.