Dear readers,
Most women I see in clinic for perimenopause have been told, somewhere along the way, that what they are feeling is “just stress,” “just aging,” or “just life.” Many have been told they are “too young” — even at 44, even at 47, even when their cycles have visibly changed. Some have been on antidepressants for years when what they actually needed was hormonal support.
Perimenopause is the multi-year hormonal transition that ends in menopause, defined as twelve consecutive months without a period. It typically begins in the late 30s to mid-40s and lasts anywhere from four to ten years. It is not a single event. It is a gradual rewiring of the hormonal system, and it begins long before periods stop.
Here are six of the earliest and most reliable signs.
1. Your cycle is changing — even if you’re still getting periods
This is often the very first sign, and it is frequently missed because most women assume “regular” means “normal.” Look for:
- Shorter cycles. A cycle that used to be 28 days is now 24 or 25.
- Heavier or longer flow in some months, lighter in others.
- Spotting between periods, or right before.
- Skipped months followed by a return to a normal pattern.
The underlying biology: as ovarian reserve declines, ovulation becomes erratic. Some cycles are anovulatory — no egg released, no progesterone produced — while others involve abnormal follicle development. The result is a cycle that becomes harder to predict and harder to depend on.
2. You’re waking at 2 or 3 in the morning
This is one of the most common, and most under-recognized, perimenopausal symptoms. The pattern is distinctive: you fall asleep without trouble, then wake in the middle of the night, often between 2 and 4 a.m., sometimes with a racing heart or anxious thoughts, sometimes for no reason at all. Going back to sleep is hard.
The biology: progesterone is the first hormone to decline meaningfully in perimenopause, and progesterone has a calming, GABA-like effect on the brain. As it falls, sleep becomes lighter, more easily disrupted, and harder to maintain through the early morning hours. Many women have been losing high-quality sleep for years before they connect it to their hormones.
3. Your mood is harder to manage
Patients describe this in different ways. I don’t feel like myself. I have a much shorter fuse with my kids. I’m anxious for no reason. My PMS used to be one bad day; now it’s two bad weeks.
The hallmark of perimenopausal mood changes is the return — or dramatic worsening — of PMS, sometimes crossing into PMDD territory, alongside a baseline rise in anxiety and irritability between cycles. Women who have never had mood issues before suddenly find themselves crying over small things, snapping at people they love, or waking up with a low-grade dread that has no source.
The biology: progesterone and estrogen both modulate the neurotransmitter systems that govern mood — GABA, serotonin, dopamine. When hormone levels become volatile rather than predictably cyclical, the brain’s mood-regulation systems struggle to keep up. This is not a personal failing, and it is not the start of an underlying mental illness. It is hormonal volatility expressed in the brain.
4. Your brain feels a step slow
Walking into a room and forgetting why. Searching for a word that used to come instantly. Reading the same sentence three times. A faint but persistent sense that you are not as sharp as you used to be.
Estrogen receptors are densely distributed in the hippocampus and prefrontal cortex — the regions responsible for memory, attention, and executive function. As estrogen levels become erratic, cognitive performance often becomes erratic with them. The good news is that perimenopausal brain fog is not the start of dementia, and it almost always improves with appropriate hormone support, sleep restoration, and the metabolic interventions discussed below.
5. Your body composition is changing — even though nothing else has
You are eating the same way. You are training the same way. But the scale is creeping up, your waist is thicker, and the muscle definition you used to take for granted is gone.
Falling estrogen drives a shift in fat distribution toward the abdomen — visceral fat that is metabolically active and inflammatory. At the same time, declining estrogen and testosterone make it harder to maintain muscle mass, while insulin sensitivity quietly worsens. The result is the classic perimenopausal pattern: less muscle, more belly fat, more cravings, and a lower threshold for blood sugar swings. The same diet and exercise routine that worked at 35 simply does not produce the same results at 45, and this is biological, not behavioral.
6. The classic signs: hot flashes, night sweats, and unexplained aches
Hot flashes and night sweats are the most well-known perimenopausal symptoms, but they often arrive later in the transition rather than at the beginning. When they do appear — sudden warmth in the face and chest, drenching sweats at night, or a thermostat that suddenly feels personal — they are unmistakable.
The lesser-known cousin is musculoskeletal pain: new joint stiffness, frozen shoulder, plantar fasciitis, or generalized body aches that do not match your activity level. Estrogen has anti-inflammatory effects and influences connective tissue throughout the body, and its decline often produces aches that women initially blame on the gym, the office chair, or simply “getting older.” When the joints are aching, the mood is off, and sleep is broken — all at once — perimenopause is almost always part of the story.
What to Do Next
If three or more of these resonate, perimenopause is worth taking seriously — even if you are still in your early 40s, even if your cycles are technically still regular, and even if your last round of lab work came back “normal.” Single-day hormone levels in perimenopause are notoriously unreliable because hormones fluctuate so dramatically across days and weeks; symptoms are usually a better guide than labs.
The conditions clustered under the perimenopausal umbrella respond well to a thoughtful, individualized approach: bioidentical hormone therapy where appropriate, targeted supplementation, sleep and nutrition support, strength training to protect muscle, and active management of insulin resistance and gut health. Most patients feel substantially better within weeks of the right plan.
The most important shift, in my experience, is recognizing that this transition is real, that it is not a character flaw or a stress reaction, and that you do not have to wait until your periods stop to do something about it. Perimenopause is treatable. Suffering through it is optional.
Schedule a Free Intro Call
If you would like to know exactly what is happening with your hormones, and have a clear plan to address it — the next step is simple. Start with a free 30-minute introductory call with The Gajer Practice to see whether we are the right fit. From there, we will build a plan that begins with comprehensive labs to map your hormonal, metabolic, and inflammatory landscape, followed by an in-depth visit with Dr. Gajer to translate those results into a personalized protocol.
You do not have to keep guessing. Call our office at 703-666-4144 or schedule a consultation with us.
Dr. Aleksandra Gajer
Founder, The Gajer Practice | Burke, Virginia
Board-Certified Physician | Functional & Performance Medicine
