We have many reasons to reconcile with our menstruation. One of them is that, if we put together all the periods of our life, we spend an average of eight years in a row menstruating. We live with it every month for approximately forty years, it begins in childhood or puberty and stays with us until the menopause stops bleeding but not certain symptoms. Can we do something to change the negative look we usually have on her? Or are we only able to see it as something uncomfortable, even embarrassing or painful? What do we know about menstruation?