How is abnormal uterine bleeding (AUB) diagnosed?

Updated: Dec 07, 2018
  • Author: Millie A Behera, MD; Chief Editor: Richard Scott Lucidi, MD, FACOG  more...
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Abnormal uterine bleeding (AUB) is irregular uterine bleeding that occurs in the absence of pathology or medical illness. It reflects a disruption in the normal cyclic pattern of ovulatory hormonal stimulation to the endometrial lining. The bleeding is unpredictable in many ways. It might be excessively heavy or light, prolonged, frequent, or random.

This condition usually is associated with anovulatory menstrual cycles but also can present in patients with oligo-ovulation. AUB occurs without recognizable pelvic pathology, general medical disease, or pregnancy. It is considered a diagnosis of exclusion.

AUB is a common diagnosis, making up 5-10% of cases in the outpatient clinic setting.

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