Copernicus did not explain, however, exactly how he came to the conclusions that the problem lay in geocentrism and the solution in heliocentrism. As a result, experts have been trying to reconstruct his path to the heliocentric theory ever since.
There Is A Wide Range Of Normal. Normal menstruation can last from one to eight days. For most women with regular menstrual cycles, their period will last on average three to five days. But that doesn't mean that anything is wrong if your period is a few days longer or shorter. Your period is unique to you and how much you bleed and for how many days you bleed will not be the same as anyone else.
Causes of Vaginal Bleeding Between Periods. Bleeding between periods is not a normal part of the menstrual cycle. On average, the cycle is 28 days long with a four-day period of bleeding. A cycle between 21 and 35 days long and a period that lasts between two and seven days is normal.