If no fertilized egg implants during the secretory phase, the lining of the uterus breaks down and the menstrual 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 (4)

• menstrual period concept
• secretory phase concept
• fertilized ovum concept
• uterus concept