Emergency? If you are soaking through a pad or tampon every hour, feel faint or short of breath, or might be pregnant and are bleeding with pain, call 911 or go to the nearest emergency room. Know the warning signs
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Glossary

Terms you may hear during your evaluation.

By the AUB editorial teamUpdated September 2026
Abnormal uterine bleeding (AUB)
Bleeding from the uterus that is abnormal in amount, timing, duration, or regularity.
Adenomyosis
Lining-like tissue growing into the muscular wall of the uterus.
Anovulation
A cycle in which no egg is released.
Endometrium
The inner lining of the uterus, shed during a period.
Endometrial ablation
A procedure that destroys the uterine lining to reduce bleeding.
Ferritin
A blood test that reflects the body’s iron stores.
Hysteroscopy
Examining the inside of the uterus with a thin camera.
Intermenstrual bleeding
Bleeding between periods.
Leiomyoma
The medical term for a fibroid.
Menopause
Twelve months in a row without a period.
PALM-COEIN
The FIGO system for classifying causes of abnormal uterine bleeding.
Progestin
A medication that acts like progesterone.
Tranexamic acid
A non-hormonal pill that reduces heavy menstrual bleeding.
Von Willebrand disease
The most common inherited bleeding disorder.