This web site was developed to help patients, physicians, and PET imaging providers learn how PET imaging is used for various types of disease; primarily in detecting, staging and monitoring cancer, but also in heart disease and brain disorders.
If your period is heavy enough to require changing it more often than every one or two hours, or if you have a period that lasts more than a full week, you may have heavy menstrual periods.n fact, many women begin to experience heavy and/or irregular bleeding in their 30s and 40s. Keep in mind it is common for periods to vary in duration and flow, and normal periods can vary from one woman to the next. But the easiest way to gauge your periods is to ask yourself how often you change your pad or tampon.
A cycle is counted from the first day of 1 period to the first day of the next period. The average menstrual cycle is 28 days long. Cycles can range anywhere from 21 to 35 days in adults and from 21 to 45 days in young teens.The rise and fall of levels of hormones during the month control the menstrual cycle.or the first few years after menstruation begins, longer cycles are common. A woman's cycle tends to shorten and become more regular with age. Most of the time, periods will be in the range of 21 to 35 days apart.