The shedding of the uterine lining, known as menstruation, marks the end of one menstrual cycle and the beginning of a new one.
The menstrual cycle is the natural changes of the uterus and ovaries in the part of making sexual reproduction possible. The average length of each cycle is 28 days, divided into 2 parts (ovarian cycle and uterine cycle), each with 3 phases. The beginning of menstrual flow, or period, marks the end of one menstrual cycle and start of a new one.
The ending of a females cycle signals the start of another.
The calendar is intended to mark the number of years since the death of King Herod the Great. The Roman abbot Dionysus Exiguus devised the new Christian calendar in 533. He knew that it was impossible to say when Jesus was born, but he knew, or thought he knew, when Herod died. So, he chose to begin his Christian calendar on the year of Herod's death, and he based this on the reign of the Roman emperor Augustus. Unaware that Augustus only adopted that name four years after his reign began, going by his birth name of Octavius until then, Exiguus commenced his calendar just 4 years too late.
The menstrual cycle begins Day 1 of your period, about half way through the cycle you ovulate and the last day is the day before your next period starts. Day 1 begins the cycle all over again. The last day of your cycle tells you the length of your cycle, on average between 24 and 34 days, although longer and shorter cycles are still "normal".
menstruation
The Storming of Bastille
you count day one as the first time you start bleeding...the last day is too hard to pinpoint because of spotting occurs after you have in actuality stopped. Usually a cycle is 3-7 days depending on the individual and heaviness of the menses.
Black Tuesday
At the end of a menstrual cycle, the unfertilized egg is either absorbed by the body or expelled during menstruation. The lining of the uterus, which thickened in preparation for a possible pregnancy, sheds as menstrual bleeding. This marks the start of a new menstrual cycle.
the mass extiction
Invasion of Poland