Metrorrhagia: Uterine bleeding at irregular intervals, particularly between the expected menstrual periods. Metrorrhagia may be a sign of an underlying disorder, such as hormone imbalance, endometriosis, uterine fibroids or, less commonly, cancer of the uterus. Metrorrhagia may cause significant anemia. See also: Menometrorrhagia; Menorrhagia.
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Last Editorial Review: 5/13/2016