What is Menstruation all about? To the ladies now, if you are above 11-12 years and you discover that there is discharge of blood from your vagina , don't freak out. It's natural and also does the body good than harm more than we think. Well, all you have to do is continue scrolling down and check out what we've got for you on this one. Menstruation Definition: Menstruation Is a periodic occurrence during the reproductive years of a lady(from menarche to menopause),In which there is moulting if inner lining if the womb followed by bleeding. In simple terms, Menstruation is a phenomenon whereby there is periodical discharge or flow of blood from the vagina during their reproductive years. It varies considerably in volume,flow rate, regularity and duration in various ladies.On a normal occurrence,the average length of menstrual cycles in ladies is about 28 days. Moreover, lengths of between 24 to 35 days are still regarded normal. A high pe...