Int J Gynaecol Obstet 143 (3): 393 - 408, 2018. doi: 10.1002 / ijgo.12666 Symptoms and Signs of AUB Compared with typical menses, abnormal uterine bleeding may do the following (see table Normal Menstrual Parameters [1]) Occur more frequently (menses < 24 days apart) Be irregular (cycle frequency varies ≥ 8 to 10 days) Involve more days of bleeding (> 8 days) Involve increased volume of blood loss (> 80 mL [or by patient report of volume]) during menses (heavy menstrual bleeding) Occur between menses (intermenstrual bleeding) Table Patients with ovulatory cycles usually have menstrual cycles that are occur at a normal frequency and are regular, but they may have heavy menstrual bleeding or intermenstrual bleeding.