My sister and i have to different opinions on this.. do the female body have to have a monthly cycle inorder to remain healthy every month?

Normal menses?: Many female athletes and dancers experience reduced periods per year and seem not to have medical problems because of it. Some birth control methods stop periods for months at a time. Whether these conditions are "healthy" is a matter of debate. Any woman experiencing irregular menses should be followed closely by her fp/gyn to make certain no problems arise.