If estrogen levels drop early during the perimenopausal phase, the pituitary gland produces more FSH, which is the hormone measured in fertility tests.

Authors

• Person: Not available Organization: Mount Sinai
  The Menstrual Cycle: How It Changes as You Age | Mount Sinai Today

Sources

• The Menstrual Cycle: How It Changes as You Age | Mount Sinai Today health.mountsinai.org Mount Sinai via serper

Referenced by nodes (3)

• estrogen concept
• FSH concept
• pituitary gland concept