pathologynuggets.blogsspot.com notes on AUB. Abnormal uterine bleeding can be either Heavy menstrual bleed or Intermenstrual bleeding. In heavy menstrual bleeding, there is excessive or prolonged bleeding during periods. It occurs during regular menstrual cycles. In contrast, bleeding occurs irregularly between menstrual cycles, in intermenstrual bleeding. If A is one cycle and B is the next menstrual cycle, in HMB, heavy bleeding or an increased amount of bleed occurs in these regular cycles, while in intermenstrual bleeding, the bleeding occurs, in between, these cycles. Other types of abnormal bleeding include post-coital bleed and postmenopausal bleeding. AUB mnemonic One of the classification systems for AUB is the mnemonic PALM COEIN. Among these, PALM represents structural causes, and COEIN represents non-structural causes. PALM stands for polyp, adenomyosis, leiomyoma, and malignancy Similarly, COEIN stands for coagulopathy, ovulatory cause, endome...