how long is periods
The menstrual cycle is not the same for every woman. On average, menstrual flow occurs every 28 days (with most women having cycles between 24 and 34 days), and lasts about 4-7 days. However, there is a wide variation in timing and duration that is still considered normal, especially if your periods began within the last few years. A small percentage of women have periods more often than every 21 days or less often than every 35 days. These variations may be normal. Often, if you are bleeding from the rectum or there is blood in your urine, you may think the blood is coming from the vagina.