Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — reproductive senescence

In perimenopause, falling estradiol doesn’t just trigger hot flashes — it disrupts serotonin production, driving mood swings, brain fog and sleepless nights. Discover the hormonal science behind “the change” and how testing can help.

Perimenopause is far more than a reproductive transition — it is fundamentally neurological. As oestradiol declines, the brain’s bioenergetic system becomes compromised, neurotransmitter balance shifts, and the thermoneutral zone narrows, giving rise to hot flashes, mood instability, memory changes and sleep disruption. This article explores the neuroscience behind the menopausal transition and why hormone replacement therapy — timed correctly — may be the most effective intervention.