Frequent cycle intervals of less than 21 days are referred to as what?

Frequent cycle intervals of less than 21 days are termed polymenorrhagia. This condition indicates that a woman experiences menstrual cycles that occur more frequently than typical, with intervals of less than 21 days, leading to more than the usual number of menstrual periods per year. It's important to recognize that this term specifically describes the frequency of menstruation, distinguishing it from other menstrual disorders.

Other terms like amenorrhea refer to the absence of menstruation, while menorrhagia indicates excessively heavy menstrual bleeding during periods. Oligomenorrhea, on the other hand, is characterized by infrequent menstrual cycles, typically occurring more than 35 days apart. Each of these terms addresses different menstrual cycle irregularities, making polymenorrhagia the most accurate choice for describing cycles that occur too frequently.