Sleep is one of the most overlooked pillars of health during perimenopause.
Many women expect hot flushes, irregular periods, mood changes and weight gain. Fewer realize that years of disrupted sleep during the menopausal transition may have consequences that extend far beyond feeling tired the next day.
A new study published on June 16, 2026 in Menopause Medical Journal suggests that poor sleep during perimenopause may be associated with lower cognitive performance decades later.
What did the researchers study?
Hu and colleagues analyzed data from 2,097 postmenopausal women participating in the St. Louis Baby Tooth–Later Life Health Study.
Participants were asked to recall their sleep quality during perimenopause and completed detailed cognitive testing later in life.
The researchers specifically examined whether women who experienced sleep disruption during the menopausal transition performed differently on cognitive testing after menopause.
What did they find?
Women who experienced moderate-to-severe sleep disturbances during perimenopause had significantly lower cognitive scores decades later compared with women who slept well.
Perhaps the most striking finding was that the relationship was strongest in women who were regularly awakened by menopausal symptoms, such as night sweats and hot flushes.
Women who rarely or never woke because of menopausal symptoms did not demonstrate the same association.
Interestingly, the findings remained even after accounting for:
- Hormone therapy use
- Current sleep quality
- Other potential confounding factors
This suggests that the perimenopausal years may represent a unique window during which sleep health matters for long-term brain health.
It is important to remember that this was a cross-sectional study, meaning it cannot prove that poor sleep causes later cognitive decline. Participants also had to recall sleep from many years earlier, introducing the possibility of recall bias. Nevertheless, the findings add to a growing body of research linking menopause, sleep, and cognitive aging.
Why sleep changes during menopause
During perimenopause, fluctuating estrogen and progesterone levels affect several systems involved in sleep regulation.
Many women experience:
- Difficulty falling asleep
- Frequent nighttime awakenings
- Night sweats
- Early morning waking
- Increased anxiety
- Lighter, less restorative sleep
Poor sleep can contribute to:
- Brain fog
- Reduced concentration
- Memory difficulties
- Mood changes
- Increased appetite
- Weight gain
- Higher cardiometabolic risk
- Reduced quality of life
Sleep is not simply “rest.” It is an active biological process during which the brain consolidates memories, clears metabolic waste, regulates hormones, and supports immune function.
What can we do?
The encouraging news is that many causes of menopausal sleep disturbance are treatable.
1. Consider menopausal hormone therapy when appropriate
For women who are suitable candidates, estrogen therapy is highly effective for reducing hot flushes and night sweats, allowing many women to sleep through the night again.
For women with a uterus, micronized progesterone is prescribed alongside estrogen to protect the uterine lining. An additional benefit is that progesterone itself has calming, sleep-promoting properties and many women report falling asleep more easily and experiencing deeper sleep.
Hormone therapy should always be individualized after discussion with a qualified healthcare professional.
2. Prioritize Lifestyle Medicine
Lifestyle Medicine remains the foundation of healthy sleep.
Evidence-based strategies include:
- Maintain a consistent sleep and wake time every day.
- Obtain morning sunlight within the first hour after waking.
- Exercise most days of the week, but avoid vigorous workouts immediately before bedtime.
- Limit caffeine after midday.
- Avoid alcohol close to bedtime, as it fragments sleep despite making you feel sleepy initially.
- Keep your bedroom cool, dark and quiet.
- Stop screens at least one hour before bed.
- Develop a relaxing bedtime routine with reading, stretching, prayer, meditation or deep breathing.
- If insomnia persists, consider Cognitive Behavioural Therapy for Insomnia (CBT-I), the first-line treatment for chronic insomnia.
3. Nutrition for better sleep
- Magnesium glycinate help promote relaxation and improve sleep quality in some individuals.
- A Mediterranean-style eating pattern rich in vegetables, legumes, nuts, seeds, whole grains and omega-3 fats supports both cardiovascular and brain health.
- Avoid large heavy meals immediately before bedtime.
My take
As a Lifestyle Medicine physician who treats women throughout the menopausal transition every day, I often tell patients that poor sleep should never simply be accepted as “part of menopause.”
If hot flushes are waking you several times every night, your hormones deserve attention.
If anxiety is preventing you from falling asleep, connect with a Psychotherapist for stress management techniques (I discuss this on my YouTube channel and podcasts).
If insomnia has become chronic, Lifestyle Medicine and CBT-I can make a remarkable difference.
Protecting sleep today may help protect your health tomorrow.
Your brain will thank you.
References
- Hu B, Lin JJ, Qiu X, et al. Sleep Disturbances During Perimenopause and Later-Life Cognitive Function. Menopause. Published June 16, 2026. doi:10.1097/GME.0000000000002790.
- Crockford JFE, Guan DX, Einstein G, et al. Menopausal Symptom Burden as a Predictor of Mid- to Late-Life Cognitive Function and Mild Behavioral Impairment Symptoms. PLoS One. 2025;20:e0301165.
- Monterrosa-Castro Á, Chedraui P, Blümel JE, et al. Sleep Disturbances Are Associated With Cognitive Impairment in Postmenopausal Women. Women & Health. 2025.
Ready to improve your sleep?
If poor sleep, night sweats, insomnia or menopause symptoms are affecting your quality of life, our multidisciplinary team at Wellness MD can help. We provide evidence-based menopause care, Lifestyle Medicine, nutrition counselling, CBT-I, and individualized hormone therapy.
Book an appointment with our clinic today and take the first step toward better sleep and better health. Wellness MD | Premier Menopause Lifestyle Medicine Clinic Canada info@wellnessmdhealth.com
Watch my podcast on improving sleep: wellnessmd.buzzsprout.com
Read the sleep chapter from my book: Thrive Through Menopause: A Medical Doctor’s Holistic Whole Body Approach Enabling You to Live Your Best Life. Available on Amazon
My desire for you is to not only survive, but THRIVE through Menopause.
