Perimenopause usually begins between 38 and 45, years before periods stop. The first signs are rarely hot flashes, they are worsening sleep, a changing cycle, irritability, memory slipping and weight climbing with no change in food. That is why almost nobody recognizes it.
Menopause has a date: the day your period completes one full year of absence. Perimenopause does not: it is the transition that starts years earlier, when progesterone and then estrogen begin an irregular decline. And it is there that most women suffer without a diagnosis, because they are still menstruating and keep hearing "everything is normal".
In Reactiva's hormonal balance form, with 226 responses, 95% women averaging 48 years old, the most marked symptoms were not hot flashes: they were fatigue and low mood (81%), bloating and abdominal weight gain (78%), anxiety or irritability and low libido (73%), lack of focus and poor memory (71%). Hot flashes, the "official" symptom, came behind, at 59%.
The first signs, in the order they usually appear
- •Sleep falling apart. Progesterone is the first hormone to fall, and it has a direct calming action on the brain: it becomes GABA, the nervous system's brake. Light sleep and waking at 3 am are the classic signature.
- •A changing cycle. Intervals shortening or stretching, different flow. It is the most objective sign and the most ignored.
- •Mood and anxiety. Estrogen modulates serotonin. When it swings, mood swings with it, and many women are put on antidepressants at this stage without anyone looking at the hormone.
- •Memory and focus slipping. The "fog" of the transition is real and has a mechanism: a brain feeling the estrogen swings.
- •Weight migrating to the belly even while eating the same, from the change in fat distribution pattern.
At what age it starts
On average between 40 and 44, but it can start at 38 or earlier. It lasts 4 to 8 years. If your mother had an early menopause, your window tends to come earlier too.
What to do with the suspicion
Do not wait for periods to stop before acting. The diagnosis of the transition is clinical, made through history and symptoms, with labs completing the picture. The sooner the map is done, the fewer years are lost treating each symptom in a different office.
Dr. Diego Rios · CRM-PI 8347 (Brazilian medical license)
Creator of the Reactiva Method. Five postgraduate degrees: Family Medicine, Endocrinology and Metabolism, Nutrology, Sports Pharmacology and General Ultrasonography.
The answer is not one more isolated lab test. It is reading the system.
Medicine is one. The body does not divide itself into specialties: the model does. When each symptom goes to a different office and each doctor sees one piece, you spend years circling between referrals, holding reports and missing answers. In that back-and-forth, you lose time and health.
Precise diagnosis and treatment come from the opposite path: understanding everything and going deep into one patient. Sleep, hormones, weight, energy and mind interpreted together, because that is how the body works.
Dr. Diego Rios, CRM-PI 8347
Educational content. It does not replace individual medical evaluation and is not a prescription. Patient care is provided in Portuguese.