Before a menstrual period begins, progesterone and estrogen levels rise to prepare the uterine lining; if pregnancy does not occur, these hormones drop sharply, which can cause premenstrual syndrome (PMS) symptoms.

Authors

• Person: Not available Organization: Liv Hospital
  4 Phases of Menstrual Cycle: Hormone Changes Chart - Liv Hospital

Sources

• 4 Phases of Menstrual Cycle: Hormone Changes Chart - Liv Hospital int.livhospital.com Liv Hospital via serper

Referenced by nodes (6)

• estrogen concept
• progesterone concept
• endometrial lining concept
• menstrual period concept
• pregnancy concept
• Premenstrual syndrome concept