Sleep apnea in women: The symptoms your doctor isn’t looking for

The wrong prototype

The clinical picture of sleep apnea that most physicians learned in training is a middle-aged overweight man who snores loudly, stops breathing according to his bed partner, and falls asleep at red lights. That prototype is real. It is also male. And it is the reason that women with OSA spend years undiagnosed while their physicians investigate depression, chronic fatigue, hypothyroidism, and anxiety, all of which are real comorbidities of untreated OSA, and none of which are the root cause.

A 2019 study in the journal SLEEP found that women with OSA reported significantly higher rates of insomnia symptoms, depression, anxiety, and restless sleep than men with the same apnea-hypopnea index (AHI). They were also significantly more likely to have seen multiple physicians before receiving a sleep referral. The average diagnostic delay in women with OSA is several years longer than in men.

This is not subtle. It is a systemic failure of a diagnostic framework built on one sex’s symptom profile.

How women’s OSA presents differently

Insomnia rather than hypersomnia. Men with OSA typically report excessive daytime sleepiness. Women more commonly report difficulty maintaining sleep, frequent nighttime waking, and feeling unrefreshed despite time in bed; a profile that overlaps almost entirely with primary insomnia and perimenopause. The Epworth Sleepiness Scale, which is the most commonly used OSA screening questionnaire, performs significantly worse as a screening tool in women for this reason.

Mood and cognitive symptoms first. Depression, anxiety, morning headaches, difficulty concentrating, and irritability are the symptoms women with undiagnosed OSA most frequently present with to their primary care physicians. Each of these is a legitimate consequence of fragmented sleep and hypoxia, but none triggers a sleep referral the way “my husband says I stop breathing” does.

REM-predominant apnea. Women are more likely than men to have OSA that occurs predominantly during REM sleep, when airway muscle tone is naturally lowest. Because REM sleep is concentrated in the second half of the night, REM-predominant OSA produces waking in the early morning hours rather than snoring throughout the night, and may not show up on an overnight sleep study that captures insufficient REM time.

Less snoring, fewer witnessed apneas. Women with OSA are less likely to snore loudly or have witnessed episodes of stopped breathing, in part because of differences in upper airway anatomy and the distribution of apnea events across sleep stages. The absence of the cardinal male symptoms leads partners and clinicians alike to dismiss OSA as a possibility.

Menopause and the inflection point

Progesterone stimulates hypoglossal nerve activity, which maintains upper airway muscle tone during sleep, and acts directly as a respiratory stimulant on the brainstem. Pre-menopausal women have substantially lower rates of OSA than age-matched men, in part because progesterone provides this protective airway effect. As progesterone declines in perimenopause and postmenopause, this protection is removed.

Multiple large epidemiological studies, including the Wisconsin Sleep Cohort, have found that postmenopausal women have OSA rates 2.6 to 3.5 times higher than premenopausal women of the same age. Hormone therapy appears to reduce this risk: a study by Shahar et al. (2003, AJRCCM) found that postmenopausal women on hormone therapy had significantly lower rates of OSA than those not on therapy. The mechanism is consistent with progesterone’s known airway protective effects.

This means that a perimenopausal woman presenting with new insomnia, fatigue, and mood changes should have OSA on the differential alongside perimenopause itself, because she may have both, and they amplify each other.

The Livium recipe

Tool. A home sleep test is the starting point. Lofta’s home sleep test does not require a physician referral, delivers results within days, and is reviewed by a board-certified sleep physician who provides a written report. A limitation of home sleep testing for women is that it may underdetect REM-predominant OSA if the test captures insufficient REM time. If the home sleep test is negative but symptoms are strong, request an in-lab polysomnography that includes full REM stage capture. A pulse oximeter worn overnight gives a preliminary indication of oxygen desaturation events before formal testing.

Behavior. If OSA is confirmed, CPAP is the first-line treatment. The RespiraX AirSense 11 is the current standard, with an auto-adjusting pressure algorithm and a patient app that provides nightly compliance and efficacy data. For women who cannot tolerate CPAP, an oral appliance (mandibular advancement device) is an evidence-based alternative. Positional therapy (avoiding supine sleep) is effective for positional OSA. For perimenopausal and postmenopausal women: discussing hormone therapy with a menopause-informed provider is appropriate, as progesterone’s airway-protective effect is a legitimate therapeutic consideration alongside the symptom management benefits.

Threshold. If you are a woman over 40 with any three of the following: unrefreshing sleep despite adequate hours, frequent nighttime waking, morning headaches, unexplained fatigue, new or worsening depression or anxiety, difficulty concentrating, you should request a sleep study regardless of whether you snore. The Epworth Sleepiness Scale score, which your physician may use as a screening tool, performs poorly in women. Your symptom picture is the more reliable indicator.

Source: AASM Practice Guidelines and Koo et al., JCM 2023.

Plan of action

• If you have unrefreshing sleep, frequent nighttime waking, or morning headaches: request a home sleep test or in-lab polysomnography regardless of whether your physician brings it up. A fingertip pulse oximeter worn overnight gives you a preliminary read on oxygen desaturation events before formal testing. Lofta’s home sleep test is available without a referral. Ask for REM-stage-specific AHI data in the results, not just the overall AHI.
• If you have been treated for depression, anxiety, or insomnia without significant improvement, and your physician has not mentioned sleep apnea: raise it explicitly. Say: “I’ve read that women with sleep apnea often present with depression and insomnia rather than snoring. Has OSA been ruled out?”
• If you are perimenopausal or postmenopausal with new sleep symptoms: discuss both sleep apnea and hormone therapy with a menopause-informed provider. They are not mutually exclusive, and both may be relevant.
• If OSA is confirmed and you are prescribed CPAP: CPAP mask liner products improve comfort and compliance, particularly for women who find the standard mask fit problematic. CPAP adherence drives outcomes; the equipment adjustment is worth pursuing.