She is 54 and she has not slept properly in two years. She wakes at three, lies there, and drifts off again just before the alarm. Mornings start with a dull headache. By mid-afternoon she can barely keep her eyes open at her desk.
Her GP put it down to menopause, which was reasonable. HRT helped the night sweats, but not the exhaustion. Nobody asked whether she snored, and she would not have known anyway: her husband sleeps in the spare room because of his own snoring.
When she finally had a sleep study, it showed she was stopping breathing more than twenty times an hour.
Obstructive sleep apnoea happens when the soft tissues of the throat relax during sleep and partly or completely block the airway. Breathing pauses, oxygen levels dip, and the brain briefly wakes you to reopen the airway, usually without you ever knowing.
For most of adult life it is far more common in men. Menopause changes that.
The best-known evidence comes from the Wisconsin Sleep Cohort, which followed hundreds of women through midlife with overnight sleep studies. Young and colleagues found that postmenopausal women were significantly more likely to have sleep-disordered breathing than premenopausal women of the same age and body size, and the difference was greater for more severe apnoea. After menopause, the gap between men and women narrows considerably.
Three things change at once.
Hormones that protect the airway fall. Progesterone stimulates breathing and helps keep the throat muscles active during sleep. Oestrogen appears to support this too. As both decline, the airway becomes more collapsible.
Fat moves. After menopause, fat tends to shift from the hips and thighs to the abdomen and neck. Fat around the neck narrows the airway, and fat in the abdomen reduces lung volume, which makes the airway less stable. This can happen even when the number on the scales barely moves. Menopause belly fat explains why.
Sleep becomes lighter and more broken. Hot flushes and night sweats already fragment sleep, which makes it harder to notice a second cause underneath.
The classic picture of sleep apnoea is a heavy, middle-aged man who snores loudly and falls asleep in meetings. Diagnostic questionnaires and referral habits were built around him.
Women often present differently. They are more likely to report:
Read that list again. It is almost identical to the symptoms of menopause itself. A woman reporting it is far more likely to be offered HRT or an antidepressant than a sleep study.
Snoring may be quieter in women, and many live alone or sleep apart from a partner, so there is no witness to the pauses in breathing.
Think about sleep apnoea, and ask about a sleep assessment, if any of these apply:
That last point is useful. HRT is very good at night sweats. If they have settled but you still wake exhausted, something else may be going on. How hormones hijack your sleep covers the other common causes.
Untreated sleep apnoea is not just a quality-of-life problem. It is linked to high blood pressure, atrial fibrillation, heart disease, stroke and type 2 diabetes, all of which already become more common after menopause. It also increases the risk of accidents, including on the road.
The menopause heart risk discussed in menopause and heart health and the diabetes risk in menopause and diabetes risk are both made worse by untreated apnoea.
In the UK, the first step is your GP, who may use a questionnaire about daytime sleepiness and refer you to a sleep service. Many are now diagnosed with a home sleep study, a small device worn overnight that records breathing, oxygen levels and heart rate.
Be specific when you ask. Say that you wake unrefreshed, describe the headaches and the broken sleep, mention any snoring or pauses someone has noticed, and say that menopause treatment has not fixed the fatigue. Questionnaires that focus on falling asleep in the daytime can underestimate the problem in women, so describe what you actually experience.
If you drive and have excessive daytime sleepiness, ask your doctor about your legal obligations. In the UK, sleep apnoea that causes excessive sleepiness affecting driving must be reported to the DVLA, but most people can keep driving once it is treated.
CPAP, a machine that blows air gently through a mask to keep the airway open during sleep, is the standard treatment for moderate to severe apnoea. Women often worry about how it will feel. Modern masks are small and quiet, and many people find the difference in how they feel within days is worth the adjustment.
Mandibular advancement devices, custom mouthguards that hold the lower jaw forward, can work well for mild to moderate apnoea.
Weight loss, particularly around the middle, reduces severity and sometimes resolves mild apnoea. Medications that cause substantial weight loss are now being studied and used for sleep apnoea too. See GLP-1 medications and women's hormones.
Alcohol and sleeping tablets relax the throat muscles further, so cutting alcohol in the evening helps. Alcohol and women's hormones covers the other reasons.
Sleeping on your side rather than your back helps some people whose apnoea is mainly positional.
Observational studies, including a large American study by Shahar and colleagues, found that women taking HRT had a lower prevalence of sleep apnoea than those who did not. That fits the biology, but observational studies cannot rule out other differences between the two groups, and HRT is not a treatment for diagnosed sleep apnoea.
The practical point is the reverse: if you are on HRT and still exhausted, do not assume the dose is wrong. Ask whether sleep apnoea has been considered.
Does menopause cause sleep apnoea?
It raises the risk. In a large American study, postmenopausal women were significantly more likely to have sleep-disordered breathing than premenopausal women of the same age and weight. Falling progesterone, a shift of fat to the neck and abdomen, and changes in sleep all contribute.
What are the signs of sleep apnoea in women?
Women more often report insomnia, morning headaches, fatigue, low mood and poor concentration than loud snoring or falling asleep in the day. These overlap closely with menopause symptoms, which is why it is often missed.
Can you have sleep apnoea without snoring?
Yes. Snoring is common but not universal, and it may be quieter in women. Many women also sleep alone, so nobody notices it.
How is sleep apnoea diagnosed?
Usually with a sleep study, often done at home with a small recording device. Your GP can refer you to a sleep service.
Will HRT fix sleep apnoea?
No. Women on HRT have lower rates in observational studies, but it is not a treatment. CPAP, mouth devices and weight loss are the main options.
Is sleep apnoea dangerous?
Untreated, it is linked to high blood pressure, heart disease, stroke, type 2 diabetes and accidents. Treatment reduces daytime sleepiness and improves blood pressure in many people.
Sources: Young T, Finn L, Austin D, Peterson A, Menopausal status and sleep-disordered breathing in the Wisconsin Sleep Cohort Study, Am J Respir Crit Care Med 2003;167(9):1181-5 · Shahar E et al., Hormone replacement therapy and sleep-disordered breathing, Am J Respir Crit Care Med 2003;167(9):1186-92 · National Institute for Health and Care Excellence, Obstructive sleep apnoea/hypopnoea syndrome and obesity hypoventilation syndrome in over 16s (NG202), 2021 · Educational only, not medical advice. If you are very sleepy while driving, stop and seek advice.
Keep reading: How hormones hijack your sleep · Menopause brain fog · Menopause belly fat · Menopause and heart health · Waking up at 3am in perimenopause · Take the free Hormone Quiz