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Anovulatory bleeding; Bleeding - dysfunctional uterine; DUB; Abnormal uterine bleeding; Menorrhagia - dysfunctional; Polymenorrhea - dysfunctional; Metrorrhagia - dysfunctional
Dysfunctional uterine bleeding (DUB) is abnormal bleeding from the vagina that is due to changes in hormone levels.
Every woman's menstrual cycle, or period, is different. On average, a woman's period occurs every 28 days. Most women have cycles between 24 and 34 days apart. It usually lasts 4 - 7 days.
Young girls may get their periods anywhere from 21 to 45 days or more apart. Women in their 40s will often notice their period occurring less often.
About every month, the levels of female hormones in a woman's body rise and fall. Estrogen and progesterone are two very important hormones. These hormones play an important role in ovulation, the time when the ovaries release an egg.
Dysfunctional uterine bleeding (DUB) most commonly occurs when the ovaries do not release an egg. Changes in hormone levels cause your period to be later or earlier and sometimes heavier than normal.
See also: Vaginal bleeding
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Casablanca Y. Management of dysfunctional uterine bleeding. Obstet Gynecol Clin North Am. 2008;35:219-234.
Damlo S. ACOG guidelines on endometrial ablation. Am Fam Physician. 2008;77:545-549.
ACOG Practice Bulletin No. 110: noncontraceptive uses of hormonal contraceptives. Obstet Gynecol. 2010 Jan;115(1):206-18.
Middleton LJ, Champaneria R, Daniels JP, Bhattacharya S, Cooper KG, Hilken NH, et al. Hysterectomy, endometrial destruction, and levonorgestrel releasing intrauterine system (Mirena) for heavy menstrual bleeding: systematic review and meta-analysis of data from individual patients. BMJ. 2010 Aug 16;341:c3929. doi: 10.1136/bmj.c3929.
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