A reproductive‑age woman presents with a 15‑day menstrual period characterized by heavy bleeding and large clots (menorrhagia); how should this be evaluated and managed?

Immediate Evaluation and Management of Prolonged Heavy Menstrual Bleeding

A reproductive-age woman with 15 days of heavy bleeding and large clots requires urgent assessment of hemodynamic stability, complete blood count with ferritin, pregnancy test, thyroid function, and transvaginal ultrasound to rule out structural pathology, followed by immediate medical management with high-dose hormonal therapy or tranexamic acid while investigating for underlying bleeding disorders. 1, 2

Initial Assessment

Hemodynamic Evaluation

Check orthostatic vital signs immediately—this bleeding duration and severity puts her at significant risk for hemodynamic instability 3, 4. Assess whether she can stand without dizziness, has tachycardia, or shows signs of hypovolemia.

Essential Laboratory Tests

• Complete blood count to assess anemia severity
• Serum ferritin (not just hemoglobin—ferritin is critical for detecting iron deficiency) 5, 3
• Pregnancy test (beta-hCG) to exclude pregnancy-related bleeding 2
• TSH and prolactin to identify ovulatory dysfunction 2
• Coagulation screening: PT/aPTT, factor VIII, von Willebrand factor antigen and activity—up to 20% of women with heavy menstrual bleeding have an underlying bleeding disorder 6, 7

Critical pitfall: The 15-day duration with large clots strongly suggests either a bleeding disorder or structural pathology. Do not assume this is simple ovulatory dysfunction 8.

Imaging

Transvaginal ultrasound is the first-line imaging study to evaluate for structural causes: polyps, adenomyosis, leiomyomas, or endometrial pathology 1. If she's never been sexually active, use transabdominal ultrasound (though less sensitive) 2.

If ultrasound cannot adequately visualize the endometrium due to fibroids or adenomyosis, proceed to MRI with diffusion-weighted imaging 1.

Acute Medical Management

For Hemodynamically Stable Patients

First-line options (choose based on contraindications):

1. Combined oral contraceptives: Give 3-4 times daily until bleeding stops (typically 24-48 hours), then taper 9, 3

2. Tranexamic acid: 1300 mg three times daily during menses—this is highly effective and can be used alone or with hormonal therapy 6, 9, 3

3. High-dose oral progestins: Medroxyprogesterone acetate 20 mg three times daily until bleeding stops 9, 3

4. Intravenous estrogen: For severe acute bleeding—25 mg IV every 4-6 hours until bleeding slows 9

For Hemodynamically Unstable Patients

• IV estrogen plus tranexamic acid
• Consider aminocaproic acid (oral or IV) as alternative antifibrinolytic 3, 4
• Transfusion if hemoglobin critically low
• Reserve surgical intervention (D&C, examination under anesthesia) only for patients who fail medical management or remain unstable 3, 4

Maintenance Therapy After Acute Control

Once bleeding is controlled, transition to long-term management:

Best option: Levonorgestrel-releasing intrauterine system (LNG-IUS)—most effective long-term treatment for heavy menstrual bleeding 6, 9, 10

Alternatives:

• Combined hormonal contraceptives (continuous or cyclic)
• Oral progestins (continuous)
• Tranexamic acid during menses only
• NSAIDs (reduce bleeding by 20-50% but less effective than other options) 9

Special Considerations

If Bleeding Disorder Identified

Work with hematology. May need DDAVP for von Willebrand disease or factor concentrates during menses for severe inherited bleeding disorders 6, 8. All hormonal methods and tranexamic acid remain appropriate 9.

Endometrial Sampling

Perform endometrial biopsy if:

• Age >45 years
• Risk factors for endometrial cancer (obesity, PCOS, unopposed estrogen)
• Failed medical therapy 2

Endometrial biopsy is preferred over D&C—safer, less invasive, lower cost 2.

Iron Replacement

Given 15 days of heavy bleeding, she almost certainly has iron deficiency. Start oral iron supplementation immediately while awaiting ferritin results 5. Consider IV iron if ferritin <15 ng/mL or if she doesn't respond to oral iron 5.

When Medical Management Fails

If bleeding continues despite appropriate medical therapy, consider:

• Hysteroscopy to visualize and treat focal lesions 2
• Endometrial ablation (if childbearing complete)
• Hysterectomy as definitive treatment 6

The key distinction: This 15-day duration is NOT normal ovulatory dysfunction—it demands thorough investigation for structural pathology and bleeding disorders before assuming a benign cause.