09/04/2026
You’ve been told progesterone declines first in perimenopause.
That’s only part of the story. 🫣
The ovaries produce BOTH progesterone and estrogen. They don’t selectively stop producing one over the other.
Estrogen begins to fluctuate in perimenopause. Estrogen is REQUIRED for ovulation and progesterone production.
She has a two-part job:
1. She tells the body it’s time to ovulate when she peaks (around day 12)
2. She primes the progesterone receptors so they can actually use the progesterone that’s produced
Estrogen doesn’t measurably decline the way progesterone does, so the party lines becomes “progesterone declines first.”
Except this means women are still left behind when taking progesterone doesn’t work. It leaves them feeling like they’ve done something wrong when, in fact, the problem is that medicine continues to misunderstand women’s physiology. 👊🏽