What is considered to be a heavy menstrual period and what are the standards regarding cramping during that time?

Menstrual bleeding: Heavy menstrual bleeding is defined as losing 80ml or more in each period, having periods that last longer than 7 days, or both. A good indication that your periods are heavy is if you: are having to change your sanitary products every hour or 2 are passing blood clots larger than 2.5cm (about the size of a 10p coin) are bleeding through to your clothes or bedding need to use 2 types of sanitary p