For many women, the years between their late 30s and early 50s are marked by changes that are difficult to explain: mood instability, disrupted sleep, unexplained weight gain, anxiety that seems to come from nowhere, memory lapses, and a general sense of not feeling like themselves. Most are told it is stress. Most have normal lab results. Most eventually accept it as part of getting older. Dr. Mary Claire Haver, board-certified OB/GYN and one of the most prominent voices in women’s midlife health, has a different explanation, and it is supported by decades of clinical and scientific evidence.
Perimenopause Begins in the Brain
Perimenopause, the hormonal transition leading up to menopause, typically begins 7 to 10 years before the final menstrual period. For many women, that places the onset in the mid-to-late 30s. Critically, this transition does not begin with the reproductive symptoms most women expect. It begins in the brain. The earliest perimenopausal symptoms are neurological: mood changes, anxiety, irritability, sleep disruption, and cognitive changes including difficulty with word retrieval and focus. These symptoms appear because the brain is densely populated with estrogen receptors, and estrogen fluctuation affects neurotransmitter systems directly.
Why These Symptoms Are So Frequently Dismissed
Because the early symptoms of perimenopause are mood-based and neurological rather than obviously reproductive, they are routinely attributed to stress, anxiety disorder, or depression. Standard hormone panels performed during early perimenopause often fall within normal ranges because the fluctuations are not yet consistent enough to register as clearly abnormal. The result is that millions of women spend years in a state of genuine hormonal disruption while being told their labs look fine and they should manage their stress better.
The Full Scope of Perimenopausal Symptoms
Dr. Haver is emphatic that the symptom profile of perimenopause extends well beyond hot flashes and irregular periods — the two features most commonly associated with menopause in public discourse. The full list includes weight gain concentrated around the abdomen, joint pain, heart palpitations, hair thinning, skin changes, reduced libido, fatigue, and the emotional and cognitive changes described above. These are not unrelated complaints. They are a coherent hormonal picture.
This Is Not Something to Quietly Endure
One of Dr. Haver’s core messages is that women do not have to accept perimenopausal symptoms as an inevitable, untreatable feature of aging. Hormone therapy, targeted lifestyle interventions, and informed medical support can meaningfully reduce symptoms and long-term health risks. The prerequisite is a healthcare provider who understands perimenopause as a whole-body hormonal transition, not simply a gynecological milestone.
Finding the Right Support
If you recognize yourself in the symptom description above and have been dismissed or told your labs are normal, tracking your symptoms in detail and seeking a menopause-informed provider is a worthwhile step. The Menopause Society (formerly the North American Menopause Society) maintains a provider finder tool at menopause.org that allows you to search for certified practitioners in your area. The conversation you have with the right provider can be genuinely life-changing.
Understanding what is physiologically happening during this transition is not a medical luxury — it is information every woman deserves to have, ideally well before the symptoms arrive. The more informed you are going in, the better positioned you are to navigate it with support.
RESOURCE:
Watch the full conversation between Dr. Mary Claire Haver and Dr. Andrew Huberman on the Huberman Lab YouTube channel:
How to Navigate Menopause & Perimenopause for Maximum Health & Vitality | Dr. Mary Claire Haver