04/20/2026
While we hear a lot about estrogen, progesterone is the unsung hero of our cycles. When levels drop, you might notice symptoms like spotting, mood swings, sleep issues, or those dreaded hormonal migraines.
So, when does it actually start decreasing?
Naturally, it dips at the end of every cycle to trigger your period. But the long-term, noticeable decline usually kicks in during perimenopause; often starting in your late 30s or early 40s.
Fun fact: Progesterone actually tends to drop before estrogen does. This creates a hormonal imbalance that triggers a lot of these frustrating symptoms long before actual menopause hits.
HormonalHealth