Menstruation
Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period (LMP). The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 31 days in adults (an average of 28 days).
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.