During the menstrual phase, estrogen and progesterone levels are at their lowest, causing the top layers of the uterine lining to break down.

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)

• estrogen concept
• progesterone concept
• endometrial lining concept
• menstrual phase concept