Normal menstrual bleeding lasts 2-7 days with a loss of around 40ml of blood

Abnormal premenopausal bleeding is anything that differs from “normal”
Abnormal is a loss of 80ml and can result in anemia

Occasionally blood clots are passed as well
Ovulation bleeding – or spotting in between menses is common

Pelvic exam may be helpful as would Ultrasound and blood work

Oligomenorrhea  -  abnormally infrequent bleeding

Polymenorrhea  -  abnormally frequent bleeding

Metrorrhagia  -  Uterine bleeding between menses
Can be linked to a variety of problems such as cancer, infection, miscarriages, and many additional causes

Treatment

   -  depends on the underlying cause
   -  Cryosurgery
   -  Electrocautery
   -  Hysterectomy
   -  others