Why Menopause Destroys Your Sleep — And How to Fix It with Dr. Vonda Wright

Perimenopause is not a slow, predictable decline. It is what Dr. Vonda Wright, a double board-certified orthopedic surgeon, calls "the zone of chaos." In this conversation with Dr. Michael Bruce (the Sleep Doctor), she explains that the root cause of the sleep disruption, brain fog, and mood swings women experience in midlife is not simply aging—it is a fundamental biological transition. Women going through this stage have "completely new biology," and the episode is a practical guide to understanding what is happening, why sleep falls apart, and what can be done about it.

The Zone of Chaos: Why Sleep Collapses

The central mechanism is hormonal instability. Women make most of their estrogen from the follicles that surround their eggs. By age 40, only about 1% of eggs remain, and the ovaries can no longer produce consistent estrogen. The brain responds by pumping out follicle-stimulating hormone (FSH) to try to rally the ovaries, but the result is a chaotic stop-and-start pattern—high one minute, low the next. This fluctuation, not a gradual decline, is what disturbs sleep and increases anxiety. As Dr. Wright puts it, "Our bodies love stability," and the instability of perimenopause makes sleep unpredictable: you can do everything right one night and sleep well, then repeat the same routine the next night and sleep terribly.