Gynaecological problems nowadays vex female lives much more than the case used to be a few generations ago. Sex ratio in the working population across the globe has risen markedly with women shouldering the burden of both household chores as well as office work. This culminated to a lot of health anomalies in females which complicate more and more as stress builds up. Abnormal menstruation is one among them.

Irregularities in menstrual cycles refer to the unusual time lag between two consecutive cycles. Such abnormality in the duration between cycles may range from 8 to 21 days which is medically termed as Polymenorrhoea. When the stretch is more than 36 days, the phenomenon is termed as Oligomenorrhoea, which culminates to women having lesser number of cycles in a year. However, the irregular time span in case of polymenorrhic patients is considered to be 'moderate', whereas an oligomenorrhoea patient is said to be having a "very irregular" cycle.
http://9jahealth.com.ng/natural-solution-menstrual-irregularities/