Abnormal Uterine Bleeding (AUB) is defined as any uterine bleeding that does not fit the pattern of normal menstrual periods. When it occurs after menopause it is termed as post menopausal bleeding and has to be investigated promptly. Similarly the term dysfunctional uterine bleeding is used when there are bleeding manifestations of anovulatory cycles in the absence of pathology or medical illness. Terms used to describe patterns of abnormal uterine bleeding, based on periodicity and quantity of flow, are:
Menorrhagia - Bleeding excessive in both amount and duration of flow, occurring at regular intervals.
Metrorrhagia - Bleeding occurring at irregular intervals and in varying amounts but not excessive.
Meno-metrorrhagia - Bleeding, which is usually excessive and prolonged and which occurs at irregular intervals.
Polymenorrhea - Frequent but regular episodes of bleeding, usually with intervals of less than 24 days.
Oligomenorrhea - Episodes of bleeding occur at intervals greater than 35 days.
Amenorrhea - No uterine bleeding for at least 6 months. It may be primary or secondary.
Inter-menstrual - Uterine bleeding that occurs in between regular cycles. |