Causes of abnormal uterine bleeding (AUB) can easily be remembered by a mnemonic PALM COEIN. P - Polyps A - Adenomyosis L - Leiomyoma (Fibroids) M - Malignancy (such as endometrial carcinoma) C - Coagulation disorders O - Ovulatory disorders E - Endometrial (such as endometrial hyperplasia) I - Iatrogenic (such as drug therapy e.g. warfarin) N - Non-classified causes (such as thyroid disease) Note: Pregnancy should always be ruled out as a cause of AUB in reproductive-age women.