Medical Term for Prolonged Menstrual Bleeding
A menstrual period lasting longer than two weeks falls under the classification of abnormal uterine bleeding (AUB), and more specifically would be described as prolonged menstrual bleeding or menorrhagia when characterized by duration exceeding 7-8 days.
Understanding the Terminology
The modern classification system for abnormal uterine bleeding uses the PALM-COEIN framework 1, 2, which categorizes causes into:
- Structural causes (PALM): Polyp, Adenomyosis, Leiomyoma, Malignancy/hyperplasia
- Non-structural causes (COEIN): Coagulopathy, Ovulatory dysfunction, Endometrial disorders, Iatrogenic, Not yet classified
What Constitutes Normal vs. Abnormal Duration
Normal menstrual bleeding typically lasts 3-7 days on average (mean 5.2 days) 3. In adolescents and reproductive-age women, bleeding lasting 8 days or longer warrants further evaluation 4.
When a period extends beyond two weeks, this represents significant prolongation that requires medical assessment to identify the underlying cause—whether structural (polyps, fibroids, adenomyosis, malignancy) or non-structural (hormonal dysfunction, coagulopathy) 1, 2.
Clinical Significance and Risk Factors
Periods lasting longer than a week have been associated with:
- Cigarette smoking (OR = 1.31-1.45) 5
- Increased risk of anemia
- Potential underlying structural pathology requiring imaging evaluation 2
Evaluation Approach
Initial assessment should include 1, 2:
- Pregnancy test (beta-hCG)
- Thyroid-stimulating hormone and prolactin levels
- Coagulation studies if indicated
- Transvaginal ultrasound to assess for structural causes
- Endometrial biopsy in women with risk factors for endometrial cancer
Common pitfall: Assuming all prolonged bleeding is hormonal without ruling out structural pathology, particularly in women over 35 or those with risk factors for endometrial hyperplasia or malignancy 2.