Progesterone & cortisol: the calm-signal axis
Progesterone supports GABAergic calming and sleep continuity; cortisol works against it. Falling progesterone is associated with 3 AM waking, a shorter fuse and less stress tolerance. These articles cover both sides of that axis.
- Low Progesterone: Symptoms, Levels and What Is Really Behind It — Restless nights, 3 a.m. wake-ups, shorter cycles, breast tenderness: how to recognise low progesterone, when to test, and which value actually means something.
- Why You Wake Up at 3AM in Perimenopause (and Why It Feels Impossible to Fall Back Asleep) — Night waking in perimenopause is not random. It is driven by cortisol shifts, progesterone decline, blood sugar drops, and nervous system activation. Understanding the pattern is the first step to breaking the cycle.
- Anxiety in Perimenopause: Why You Suddenly Feel Different — and What Your Body Is Trying to Tell You — Anxiety in perimenopause is not a character flaw — it is a system signal. Learn what actually drives it and why understanding the pattern changes everything.
- Brain Fog in Perimenopause: Why You Feel Like a Different Person (and What's Actually Happening) — Brain fog in perimenopause is not a sign of decline — it is a sign of system change. Learn what actually causes it and why tracking patterns over time changes everything.
- Perimenopause Symptoms: The Complete Guide — Why They Happen, What They Mean, and Why They Often Feel So Random — Perimenopause symptoms are not random. They are driven by hormonal instability affecting the brain, metabolism, nervous system, skin, and more. Understanding patterns over time is more valuable than single observations.
- Longevity in Perimenopause — and Why the Most Effective Levers Cost Nothing — Longevity in perimenopause does not need 20 supplements or daily training. The best-evidenced levers cost nothing — and matter more than any pill on the shelf.
- Is My HRT Working? How to Tell If Your Hormone Therapy Is Dialled In — You started HRT — but how do you know it is actually working? Why a single blood value cannot tell you, and what to do when you barely feel a difference.
- Heart palpitations in perimenopause: causes and context — Racing heart, skipped beats, restlessness out of nowhere. What drives palpitations hormonally, which labs give context, and when a racing heart needs medical review.
- Irritability and Mood Swings in Perimenopause: When Patience Disappears — Zero to sixty over something trivial, then guilt. Why irritability in perimenopause is not a character flaw, what progesterone has to do with it, and how to make the pattern visible.
- Heavy and Irregular Bleeding in Perimenopause: What Is Normal and What Is Not — Cycles of 21 days, then 45. Bleeding like a flood, clots, doubling up on protection. Why this is so common in perimenopause, where the red lines are, and which values belong in the picture.