of midlife women report cognitive symptoms
Brain fog can include forgetfulness, distractibility, and difficulty finding words.
Read the sourceThe Svarene library
Evidence-linked guides to common perimenopause questions—written to inform, normalize, and help you prepare, never to diagnose.
A few anchors from the evidence
Research can make an experience more legible. It cannot tell you what a symptom means for you without individual clinical context.
Brain fog can include forgetfulness, distractibility, and difficulty finding words.
Read the sourceThis definition applies when hormonal contraception is not affecting bleeding.
Read the sourceA 2024 study found higher odds of subjectively reported sleeping hot flashes after acute temperature increases.
Read the sourceCycles without alarms
Understand changing flow, longer gaps, and cycle-length variation without fertility-first assumptions or ‘late period’ warnings.
When nights shape days
Understand night waking, sleep quality, energy, mood, and brain fog together—without turning a difficult week into a diagnosis.
Make trial and error visible
Understand what you take, when something changes, and what you notice afterward—without claiming that one caused the other.
Environmental symptom intelligence
Explore whether heat, humidity, pressure, UV, air quality, or pollen may coincide with changes in how you feel.
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