english: For many years, because there was no standardization in the definition of PMS, when psychologists tried to report prevalence rates, their estimates ranged from five percent of women to 97 percent of women, so at the same time almost no one and almost everyone had PMS.
non_english: Pretože dlhé roky neexistovala štandardná definícia PMS, keď sa psychológovia snažili určiť všeobecné rozšírenie, ich odhady sa pohybovali  od 5 percent žien až po 97 percent žien, takže zároveň skoro nikto  a skoro všetci trpeli na PMS.