(DUB) Heavy bleeding from the uterus. See anovulatory dysfunctional bleeding (often painless and irregular) and ovulatory dysfunctional bleeding (usually regular and can be associated with dysmenorrhea).

Irregular and generally heavy bleeding caused by anovulatory cycles. The underlying causes and how to prevent the sometimes harmful consequences, including endometrial hyperplasia.

Heavy but generally regular bleeding caused either by pathology in the uterus, such as fibroids, or by a generalised bleeding disorder, such as thrombocytopenia (a low platelet count), von Willebrand's disease (can run in families), or treatment with anticoagulant drugs. The formal term for it is menorrhagia.

Menstrual cycles caused by ovarian activity (or ovarian cycles) not accompanied by ovulation. The serum progesterone stays low, whereas some development of tertiary follicles and production of estradiol takes place. See also anovulatory dysfunctional uterine bleeding.

A common condition in which tissue like the lining of the uterus (the endometrium), grows somewhere else, sometimes causing dysmenorrhea, premenstrual spotting, infertility, dyspareunia and ovulatory dysfunctional uterine bleeding.

Traditional medical term for dysfunctional uterine bleeding, or, simply, heavy periods.