Women may have sleep apnea without loud snoring. Hormonal changes and testing limits can make it harder to recognize and treat.
Obstructive sleep apnea can look different in women, and that difference may leave some people without a diagnosis. Instead of loud snoring and obvious pauses in breathing, women may notice insomnia, repeated waking, fatigue, headaches, or mood changes. These symptoms can be mistaken for other health concerns, even though untreated sleep apnea can affect heart health, concentration, and daily life.
“The disease itself was defined in men,” says Jennifer Martin, PhD, a behavioral sleep medicine specialist and professor at Florida International University’s Herbert Wertheim College of Medicine. The way men and women breathe during sleep differs, she explains, but common definitions and screening habits have not fully accounted for those differences.
What sleep apnea can look like in women
Obstructive sleep apnea, or OSA, is the most common type of sleep-disordered breathing. During sleep, the upper airway repeatedly narrows or collapses, limiting airflow to the lungs. Anita Valanju Shelgikar, MD, a sleep medicine physician at University of Michigan Health, says the familiar signs—loud snoring and gasping—come largely from studies of men.
Women with OSA may instead have trouble staying asleep, wake several times during the night, or experience insomnia and nightmares. Daytime fatigue, morning headaches, and mood swings can follow. Women also tend to have more hypopneas, episodes of shallow breathing with reduced oxygen flow. Men more often have apneas, when breathing stops completely for a period.
Biology may help explain the differences. Women generally have smaller, more stable airways that are less likely to collapse and vibrate during sleep. They also tend to have less fat around the neck. Before menopause, estrogen and progesterone may support breathing through effects on the respiratory system. Researchers are still studying how these factors interact and how much they contribute to different symptoms.
Snoring may be underreported for social reasons, too. Some women may feel embarrassed to mention it, given expectations about how women are supposed to sleep. But anatomy and hormonal changes are likely part of the explanation, so a lack of reported snoring does not rule out OSA.
Menopause changes the picture
OSA appears less common and is often milder in women than in men before menopause. In the United States, men make up about 59% of people with OSA and women about 41%, according to research cited in the source article. After menopause, falling estrogen and progesterone levels are associated with a sharp rise in both the rate of OSA and the severity of symptoms.
Studies estimate that 47% to 67% of postmenopausal women have OSA, a range similar to that reported for men aged 50 and older, at about 50%. Estimates of how many women have the condition are not the same as counts of diagnosed cases, however. Many may not have been tested.
At any age, women can experience more sleep-related symptoms than men, even when their breathing disturbances are considered less severe. Martin says subtler disruptions may still reduce the quality of sleep. This helps explain why a person’s symptoms and daily difficulties may not match what a clinician expects from the classic picture of sleep apnea.
Why diagnosis can be missed
When someone reports snoring and daytime sleepiness, a clinician may quickly consider sleep apnea testing. Women who describe poor sleep and fatigue may be referred less often, Martin says. One study found men were nine times more likely than women to be referred for diagnostic testing.
Symptoms can also be attributed to depression, anxiety, insomnia, menopause, or medication effects, Shelgikar says. Those conditions can occur alongside OSA, making the cause of poor sleep harder to identify. Insomnia and OSA together are more common in women than in men, according to Martin. Some medicines used as sleep aids, including diphenhydramine and benzodiazepines, can relax throat muscles and may worsen breathing problems during sleep. Medication choices are individual, so concerns about sleep or a medicine’s effects are best discussed with a clinician or pharmacist.
Testing standards can add another hurdle. A sleep-related breathing interruption is generally counted when it causes either a drop in oxygen or a brief awakening. Women may have fewer steep oxygen drops than men, so their breathing disruptions may not meet criteria as readily, even when sleep is repeatedly disturbed. Martin says this can bias diagnosis toward patterns more often seen in men.
Home sleep apnea tests are less costly than overnight testing in a sleep lab, but they can miss milder or less frequent events. That may be a particular limitation for women, who tend to have fewer and less severe episodes. Insomnia can complicate home testing as well: a monitor may record six hours while the person sleeps for only four, making the breathing problem appear less frequent than it is.
These limitations mean the number of women living with OSA may be higher than the number identified in available records. A delay in recognition can also mean a delay in care and in addressing related health concerns.
Why treatment matters
Each time breathing is interrupted, the body responds to reduced oxygen by releasing adrenaline, which briefly rouses the person to breathe again. These awakenings may last only seconds and often go unnoticed. Repeated through the night, the cycle can place strain on the cardiovascular system, says Atul Malhotra, MD, research chief of pulmonary, critical care, and sleep medicine at UC San Diego Health.
Over time, that strain may raise the risk of high blood pressure, heart attack, stroke, irregular heartbeat, and heart failure. Research on whether women with severe OSA experience more cardiovascular complications than men is mixed. Women are also more likely to have other health conditions when diagnosed, including thyroid disease, asthma, and depression. It’s not always clear whether these conditions contribute to sleep apnea, result from it, or simply occur at the same time.
Poor-quality sleep can also affect memory, thinking, and alertness during the day. Reduced alertness may increase the risk of accidents while driving or doing safety-sensitive work. Martin says sleep apnea also deserves consideration when people are experiencing mental health symptoms. Research suggests that treating OSA may help improve anxiety or depression symptoms for some people, though it is not a substitute for care tailored to those conditions.
Martin says there is good evidence women benefit at least as much as men from OSA treatment, and possibly more. That makes recognizing less familiar symptoms and getting an appropriate assessment meaningful, even when someone does not snore loudly.
When to seek an assessment
Persistent daytime sleepiness deserves attention; Shelgikar says it should not be assumed to be an inevitable part of aging or a particular life stage. A sleep diary can help track how rested someone feels on waking and how their energy changes through the day. The National Heart, Lung, and Blood Institute’s sleep diary is one resource.
Snoring is also worth mentioning to a health professional, whether or not it feels severe. It is not something to be embarrassed about, Malhotra says. Managing other concerns, such as high blood pressure or insomnia, may improve some symptoms, but it does not establish whether OSA is present.
If symptoms continue and an initial assessment does not address them, a sleep medicine specialist can help consider which test is appropriate and what care options may fit. People can explain how often they wake, whether anyone has noticed snoring or breathing changes, and how sleep affects daytime functioning. A clinician can weigh those details alongside other health conditions and medications.
For women, the absence of dramatic snoring or gasping does not settle the question. Ongoing sleep disruption and fatigue are useful reasons to raise the possibility of OSA and ask whether further evaluation makes sense.
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