The hormonal transition starts years before menopause. If your body feels different and no one can explain why, perimenopause may be the answer. Eros MD evaluates and treats perimenopause with physician-guided precision.
about perimenopause
Perimenopause is the transitional phase leading to menopause, during which the ovaries gradually produce less estrogen and progesterone. It typically begins in a woman's early to mid-40s but can start as early as the mid-30s. The transition lasts an average of four to eight years, ending when a woman has gone 12 consecutive months without a period, at which point menopause is confirmed.
What makes perimenopause particularly challenging is its unpredictability. Hormone levels do not decline in a straight line. They fluctuate erratically, sometimes producing estrogen surges followed by sharp drops. This volatility creates a symptom pattern that can be confusing and difficult to diagnose. Many women visit multiple doctors for individual symptoms (anxiety, insomnia, irregular periods, fatigue) without anyone connecting them to the same hormonal cause.
Progesterone is typically the first hormone to decline in perimenopause, often years before estrogen drops significantly. This early progesterone decline is strongly associated with sleep disruption, increased anxiety, and menstrual irregularity, the symptoms that many women notice first.
symptoms to watch for
Many women in perimenopause are told their symptoms are stress, aging, or unrelated. The cluster below is what actually points to a hormonal cause. Many of these symptoms overlap with thyroid dysfunction, iron deficiency, depression, and chronic stress, which is why physician evaluation and appropriate lab work distinguish between causes.
Cycles that become shorter, longer, heavier, lighter, or unpredictable. Skipped periods interspersed with normal cycles. This is often the first noticeable sign.
Anxiety that appears for the first time or intensifies significantly, often without an identifiable external trigger. Progesterone decline directly affects GABA pathways, the brain's primary calming neurotransmitter system.
Difficulty falling asleep, frequent waking, or waking at 3 to 4 AM unable to return to sleep. Often precedes hot flashes by months or years.
Persistent fatigue that sleep does not resolve. Difficulty concentrating, word-finding lapses, and short-term memory issues.
May begin during perimenopause, though not all perimenopausal women experience them. When present, they compound sleep disruption.
Irritability, low mood, emotional reactivity that feels disproportionate to the situation. Reduced sexual desire or arousal that does not align with relationship satisfaction. These are hormonal, not characterological.
the evaluation
Perimenopause cannot always be confirmed by a single blood test because hormone levels fluctuate significantly during this phase. Diagnosis is clinical, based on age, symptom pattern, menstrual history, and supporting lab work. Your Eros MD provider uses all available data points to build a complete picture. A single normal FSH does not rule out perimenopause, and a single elevated FSH does not confirm it.
The reproductive hormone panel. Tracks the transition pattern. Levels fluctuate during perimenopause, which is why your provider considers the full picture, not a single value.
Plays a meaningful role in women's energy, mood, and libido. Often overlooked in standard perimenopause evaluation.
TSH, free T3, free T4 to differentiate thyroid dysfunction (which mimics perimenopause). AMH (anti-Mullerian hormone) where relevant to ovarian reserve assessment.
Iron deficiency, B12 deficiency, and vitamin D insufficiency are common contributors to fatigue that compound perimenopause symptoms.
treatment options
Treatment is staged and individualized. Early perimenopause often responds to progesterone alone. As the transition progresses, low-dose estrogen is added. Lifestyle and supplementation support the protocol throughout.
Your provider designs a protocol around where you actually are in the transition, not a one-size-fits-all template.
Hormone replacement therapy can be initiated during perimenopause. Low-dose HRT or cyclic progesterone therapy addresses the hormone fluctuations driving symptoms. The protocol evolves as the transition progresses.
For women in early perimenopause where progesterone decline is the primary driver, cyclic oral micronized progesterone alone may be sufficient to address sleep disruption, anxiety, and menstrual irregularity. Often the right starting point.
Targeted supplementation (magnesium, vitamin D, iron where deficient) and lifestyle guidance for sleep, stress management, and exercise that supports hormonal health during the transition. Often used alongside hormonal therapy.
Perimenopause touches multiple systems. Weight changes, hair thinning, and sexual health shifts often cluster with the core hormonal symptoms. Eros MD coordinates care across these adjacent programs when relevant.
How it works
Discreet, physician-led, no in-person visit required for most patients.
Complete your confidential intake covering symptoms, cycle history, health background, and medications.
Physician reviews your intake and orders the appropriate lab panel.
Lab work completed locally. Results reviewed by your physician.
Physician discusses findings, diagnosis, and treatment options with you directly.
If treatment is appropriate, prescription sent to pharmacy. Ongoing monitoring built into your plan.
Questions worth asking
Perimenopause typically begins in the early to mid-40s but can start as early as the mid-30s. If you are experiencing cycle changes, new anxiety, or unexplained fatigue in your late 30s or 40s, perimenopause should be evaluated.
Perimenopause is the transition phase during which hormones fluctuate and decline. Menopause is confirmed after 12 consecutive months without a period. Perimenopause symptoms can be just as disruptive as menopause symptoms, and treatment is available during both phases.
Yes. HRT can be initiated during perimenopause. In some cases, progesterone therapy alone is sufficient for early perimenopausal symptoms. Your provider determines the most appropriate approach based on your evaluation.
Perimenopause symptoms progress into menopause. Some symptoms resolve after the transition stabilizes, but others (particularly genitourinary symptoms and bone density loss) are progressive without treatment. Treatment during perimenopause can reduce symptom severity and potentially improve long-term health outcomes.