Which of the following statements is false regarding oligomenorrhoea?

All of the above statements are false regarding Oligomenorrhoea. Oligomenorrhoea: It denotes infrequent, irregularly timed episodes of bleeding usually occuring at intervals of more than 35 days. A revised terminology system for abnormal uterine bleeding in nongravid reproductive-age women was introduced in 2011 by the International Federation of Gynecologgy and Obstetrics(FIGO). This was the result of an international consensus process with the goal of avoiding poorly defined or confucing terms used previously (eg., menorrhagia, menometrorrhagia, Oligomenorrhoea). The classification system is referred to by the acronym PALM-COEIN PALM- Polyp, adenomyosis, leiomyoma, malignancy and hyperplasia COEIN- coagulopathy, ovulatory dysfunction, endometrial, iatrogenic and not yet classified. Ref: Shaw&;s textbook of Gynecology 17th edition Pgno: 122