Dysfunctional uterine bleeding (DUB) Dysfunctional uterine
bleeding (DUB) is abnormal bleeding from the vagina that is due
to changes in hormone levels. Anovulatory bleeding; Bleeding -
dysfunctional uterine; DUB; Abnormal uterine bleeding;
Menorrhagia - dysfunctional; Polymenorrhea - dysfunctional;
Metrorrhagia - dysfunctional Causes, incidence, and risk factors
The menstrual cycle, or period, is not the same for every woman.
On average, menstrual flow occurs every 28 days (most women have
cycles between 24 and 34 days apart), and lasts 4 - 7 days. The
menstrual cycle of young girls who are just starting to have
their periods can range from 21 to 45 days or more apart. Women
in their 40s will often notice their menstrual cycles occurring
less often. During a normal menstrual cycle, levels of different
female hormones made by your body go up and down. Estrogen and
progesterone are two very important hormones. Ovulation is the
part of the normal menstrual cycle when an egg is released from
the ovaries. The mos