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Abnormal uterine bleeding: Clinical
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Additionally, normal menstrual cycles are regular, meaning that the shortest and longest cycles in a 12 month period don’t usually vary by more than 9 days.
Pathological vaginal bleeding, or “abnormal uterine bleeding”, on the other hand, describes any variation in normal bleeding patterns - in terms of age, frequency, regularity, duration, or volume.
Age-wise, any kind of bleeding is considered abnormal before menarche and after menopause.
Abnormalities in frequency and regularity can mean that cycles either occur irregularly, or that they are very short or very long. This also includes unscheduled intermenstrual bleeding - bleeding between cycles.
If there’s hypovolemia, lab work includes a CBC, which usually shows a normal hemoglobin level, because the individual is losing whole blood.
Over the next 24 hours, there’s a physiologic compensation of holding onto more water, and IV fluids are usually given - and that decreases the hemoglobin level.
Abnormal uterine bleeding (AUB) refers to uterine bleeding of abnormal quantity, duration, or schedule. There are many possible causes of AUB, and the exact cause can often be difficult to determine. However, some common causes of AUB include hormonal imbalances, uterine fibroids, polyps, endometriosis, and neoplasia.
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