Ten Menstrual Cycle Myths

The menstrual cycle is different for each woman. Generally, menstrual flow lasts 3 to 7 days, with an average of 5 days for most women. The menstrual cycle begins with the first day of bleeding and this is counted as day one. The average cycle length is 28 days, but in reality, the usual range is 25 to 36 days. It is normal for the number of days in each cycle to vary monthly. However, it is important to see your doctor if your period comes less than 21 days or more than 35 days after the onset of your last period. See your doctor if your period is frequently irregular, lasts more than one week, or your flow is heavier than normal.