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.
Regular Periods. 1  A woman's menstrual cycle typically follows a 28-day cycle, ending when the lining of the uterus is shed and bleeding occurs. 2  When a body is placed under constant and/or excessive stress, the body secretes the stress hormones adrenaline and cortisol.