Medical Term for Heavy Menstrual Period
The medical term for a heavy menstrual period is "heavy menstrual bleeding" (HMB), which has replaced the older term "menorrhagia." 1, 2, 3
Definition and Clinical Significance
Heavy menstrual bleeding is formally defined as excessive menstrual blood loss that interferes with a woman's physical, social, emotional, or material quality of life. 2, 3 The quantitative threshold is menstrual blood loss exceeding 80 mL per cycle, though clinical assessment focuses more on functional impact than precise measurement 3, 4.
Key Clinical Indicators
Practical bedside indicators that predict HMB include 4:
- Blood clots ≥1 inch in diameter
- "Flooding" (requiring pad or tampon change more frequently than hourly)
- Low serum ferritin levels
- Prolonged menstrual bleeding duration
Modern Classification System
The PALM-COEIN classification system is the current standard for categorizing causes of abnormal uterine bleeding in reproductive-age women 1:
Structural Causes (PALM):
- Polyp
- Adenomyosis
- Leiomyoma (fibroids)
- Malignancy and hyperplasia 1
Non-Structural Causes (COEIN):
- Coagulopathy (bleeding disorders)
- Ovulatory dysfunction
- Endometrial disorders
- Iatrogenic (medication-related)
- Not yet classified 1
Prevalence of Underlying Causes
Bleeding disorders are surprisingly common in women with HMB, affecting approximately 30% overall, with significantly higher rates (39%) in adolescents compared to adults (16%). 5 Specific disorders include:
- Von Willebrand disease: 8% 5
- Platelet function defects: 9% 5
- Thyroid abnormalities: 3% 5
- Polycystic ovarian syndrome: 8% 5
Up to 20% of women with HMB have an underlying inherited bleeding disorder, making hematologic evaluation critical when HMB is accompanied by personal or family bleeding history 3, 4.
Clinical Impact
HMB is the most common cause of iron deficiency and iron deficiency anemia in reproductive-age women, adversely affecting quality of life both during bleeding episodes and continuously due to iron depletion 6. The condition impacts cognitive function, work productivity, school attendance, and may even affect fetal neurodevelopment when iron deficiency persists into pregnancy 6.