The first day of menses is identified as cycle day one, at which point estrogen levels are at a low point.

Authors

• Person: Not available Organization: UCSF Health
  The Menstrual Cycle | Patient Education - UCSF Health

Sources

• The Menstrual Cycle | Patient Education - UCSF Health www.ucsfhealth.org UCSF Health via serper

Referenced by nodes (2)

• estrogen concept
• menses concept