The menstrual cycle begins on the first day of a person's period and concludes on the day before the next period begins.

Authors

• Person: Not available Organization: Clue
  Understanding the Phases of the Menstrual Cycle - Clue

Sources

• Understanding the Phases of the Menstrual Cycle - Clue helloclue.com Clue via serper

Referenced by nodes (2)

• period concept
• menstrual cycle concept