Anovulatory cycle
While the normal menstrual cycle in the human typically lasts 4 weeks (28 days, range 24–35 days) and consists of a follicular phase, ovulation, and a luteal phase, followed by either menstruation or pregnancy, the anovulatory cycle has cycle
lengths of varying degrees. In many circumstances, menstrual intervals are prolonged exceeding 35 days leading to oligomenorrhea (cycle >35 – 180 days interval), or even longer, amenorrhea. In other cases, menstruation may be fairly regular (eumenorrhea), or more frequent (intervals < 21 days), or there may be a loss of menstrual pattern (menorrhagia, dysfunctional uterine bleeding).
Bombus morio
Not much is known about the colony cycle of the "Bombus morio." There have been some hints about the length of their cycles, however. The longevity of individual workers within a eusocial bee species is one of the most important indicators of colony growth and reproductive rates of bee colonies. In the "Bombus morio," the average worker bee lives about 41.3 days. Additionally, the egg-to-adult period is about 32 days for workers, 35 days formales, and 32 for queens. These lengths are longer than the average and indicate slow colony growth.