By Dr. Shamsah Amersi, MD, FACOG
Perimenopause is one of the most significant hormonal transitions in a woman’s life, yet it is also one of the least understood. Many women are told that menopause begins when their periods stop, but the hormonal shifts that lead to menopause often begin years earlier. This stage, known as perimenopause, can start in a woman’s late thirties or forties and may last for several years.
During this time hormone levels fluctuate in ways that can affect nearly every system in the body. Unfortunately, many women are not told that these symptoms may be related to hormonal changes. Instead, they are often told that stress, aging, or lifestyle factors are to blame. As a result, women may spend years feeling unlike themselves without realizing what is happening.
Understanding the symptoms of perimenopause can help women recognize these changes earlier and seek appropriate care.
One of the most common but least discussed symptoms of perimenopause is cognitive change. Many women notice that their memory feels less sharp, that they struggle to concentrate, or that they have difficulty finding words in conversations. This experience is often described as brain fog.
Estrogen plays an important role in brain function and neurotransmitter activity. As hormone levels fluctuate, women may experience temporary changes in cognitive clarity. While these symptoms can feel unsettling, they are a common part of hormonal transition and often improve when hormonal balance is addressed.
Hormonal fluctuations can also influence mood and emotional regulation. Some women develop anxiety during perimenopause even if they have never experienced it before. Others notice increased irritability, mood swings, or a sense that their emotional resilience has changed.
These changes are often linked to the way estrogen and progesterone interact with neurotransmitters such as serotonin and dopamine. When hormone levels fluctuate unpredictably, the brain’s emotional regulation systems can be affected.
Sleep changes are another hallmark of perimenopause. Many women find themselves waking during the night, struggling to fall asleep, or feeling less rested in the morning. Even before classic menopausal symptoms such as hot flashes appear, sleep patterns may begin to shift.
Hormones influence circadian rhythm, body temperature regulation, and stress hormones such as cortisol. When these systems are disrupted, sleep quality often declines. Poor sleep can then contribute to fatigue, mood changes, and difficulty concentrating.
Joint discomfort is a symptom that often surprises women during perimenopause. Some women experience stiffness, aching joints, or a sense of increased inflammation in the body. These symptoms are sometimes mistaken for orthopedic problems or early arthritis.
Estrogen has anti inflammatory properties and plays a role in maintaining connective tissue health. As estrogen levels fluctuate, some women notice changes in joint comfort and mobility.
Another common concern during perimenopause is unexpected weight gain or changes in body composition. Women may find that their metabolism feels slower or that fat distribution begins to shift toward the abdominal area.
Hormonal changes can influence insulin sensitivity, muscle mass, and fat metabolism. Sleep disruption and increased stress hormones can further affect metabolic balance. Maintaining muscle through strength training and supporting metabolic health become increasingly important during this stage of life.
Perimenopause does not look the same for every woman. Some experience only mild symptoms, while others notice more significant changes in mood, sleep, energy, and metabolism. Because many of these symptoms develop gradually, they are often overlooked or attributed to other causes.
Recognizing that these changes may be part of a hormonal transition allows women to approach them with greater understanding and support.
Perimenopause should not be viewed simply as a period of decline. With the right medical guidance, lifestyle support, and individualized care, many women navigate this stage while maintaining energy, clarity, and overall well being.
Education is an important first step. When women understand what is happening in their bodies, they are better equipped to advocate for their health and make decisions that support their long term vitality.
