05/02/2026
https://www.femmewell.co.nz/other/perimenopause-when-your-hormones-start-changing/
Most women think it starts with hot flushes and missed periods somewhere in their late 40s or 50s. In reality, perimenopause often begins much earlier — and far more quietly.
For many women, the first signs show up in their late 30s or early 40s, often disguised as:
- Worsening PMS
- Shorter or heavier cycles
- Anxiety or low mood
- Poor sleep
- New food sensitivities
- Feeling “not quite yourself”
And the hormone most responsible for this early shift? = Progesterone.
In early perimenopause, ovulation becomes less consistent. And when ovulation becomes irregular, progesterone production drops.
This matters because progesterone is your:
* Calming, anxiety-buffering hormone
* Sleep-supporting hormone
* Natural counterbalance to estrogen
When progesterone starts to decline, women often notice:
* Increased irritability or anxiety (especially premenstrually)
* Poor sleep or early waking
* Heavier or more symptomatic periods
* Breast tenderness
* Shorter cycles
* Stronger emotional reactions to stress
Many women describe this phase as:
“I feel more reactive, more tired, and less tolerant of everything.”
Sound familiar?
