• Abnormally heavy bleeding during menstruation.
  NICHD Pediatric Terminology
  U.S. National Cancer Institute, 2021
• Abnormally heavy menstrual bleeding.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Excessive uterine bleeding during MENSTRUATION.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Heavy bleeding during regular menstruation.
  NCI
  U.S. National Cancer Institute, 2021
• Heavy or large blood loss during menses.
  U.S. FDA Glossary
  U.S. Food & Drug Administration, 2021
• Prolonged and excessive menses at regular intervals in excess of 80 mL or lasting longer than 7 days.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• A disorder characterized by abnormally heavy vaginal bleeding during menses.
  Common Terminology Criteria for Adverse Events
  U.S. National Institutes of Health, 2021
• Menorrhagia is defined as menstruation at regular cycle intervals but with excessive flow and duration and is one of the most common gynecologic complaints in contemporary gynecology. See the image below.
  Medscape
  WebMD, 2025
• Menorrhagia is the medical term for menstrual periods with abnormally heavy or prolonged bleeding. Although heavy menstrual bleeding is a common concern, most women don't experience blood loss severe enough to be defined as menorrhagia.
  Mayo Clinic
  Mayo Foundation for Medical Education and Research, 2025