Women’s health research has historically focused on the reproductive system while largely excluding sleep and other physiological areas studied predominantly in men, according to a report published by Oura Ring. The National Institutes of Health did not require clinical studies to include women until 1993, leaving decades of baseline sleep science based on male physiology.
How Do Hormonal Shifts Across the Menstrual Cycle Affect Sleep Patterns?
Women experience monthly hormonal fluctuations that influence sleep architecture, core body temperature regulation, and airway stability. Estrogen rises through the first half of the menstrual cycle and peaks just prior to ovulation, providing a protective effect against sleep-disordered breathing. During the luteal phase, progesterone levels increase and correlate with higher rates of nighttime awakenings and reduced overall sleep quality.
For the majority of women maintaining regular cycles, these hormonal shifts remain subtle, keeping weekly sleep fairly consistent. However, individuals experiencing severe premenstrual syndrome or painful menstrual cramps report significantly poorer sleep in the days leading up to and during menstruation. Gynecological conditions such as endometriosis and polyendocrine metabolic ovarian syndrome (PMOS, formerly known as PCOS) further disrupt natural hormone patterns and degrade rest.
What Causes Sleep Disruptions During Pregnancy and the Postpartum Period?
Physical discomfort from a growing fetus and frequent nocturnal bathroom trips are only part of the equation during pregnancy. A meta-analysis cited by Oura Ring covering more than 15,000 pregnant women found that 38% reported insomnia symptoms, with that figure climbing to nearly 40% during the third trimester.
These sleep disruptions carry physiological consequences. An NIH-funded study of over 10,000 first-time pregnant women, known as the nuMoM2b study, showed that individuals whose sleep midpoint shifted later past 5 a.m. faced higher odds of developing gestational diabetes. Research also links nighttime breathing disturbances during pregnancy to gestational diabetes and gestational hypertension.
“Many women just assume that their poor sleep and feeling tired is because they are pregnant,” says Dr. Chris Curry, clinical director of women’s health at Oura Ring. “However, these symptoms may also be related to undiagnosed obstructive sleep apnea.”
Postpartum recovery introduces lasting sleep deficits. Mothers tracked in postnatal studies slept roughly one hour less per night in the first three months following birth compared to their pre-pregnancy baselines. When their first child reached ages 4 to 6, mothers still averaged about 20 minutes less sleep than they did before pregnancy.
Why Does Sleep Deteriorate During Perimenopause and Postmenopausal Years?
Sleep difficulties surge during the menopausal transition, driven by declining estrogen levels and vasomotor symptoms like night sweats. Survey data from the Study of Women’s Health Across the Nation (SWAN), encompassing more than 12,000 midlife women, revealed that 45% of respondents in late perimenopause reported difficulty sleeping.
A separate study of over 3,000 midlife women connected declining estrogen directly to trouble falling and staying asleep. Oura Ring’s 2024 Perimenopause Report, drawing on data from more than 100,000 members, indicated that women lost up to two hours of sleep per week while transitioning from premenopause to postmenopause, alongside measurable declines in deep and REM sleep stages.
“Sleep can change across the menopause transition, but not every symptom can be attributed just to the fact that someone is in perimenopause,” Dr. Curry says. “If a woman notices that sleep issues are impacting their daily life, talking to their doctor about sleep conditions and getting screened for things like obstructive sleep apnea is worth the time.”
Which Common Sleep Disorders Disproportionately Affect Women?
Medical criteria for diagnosing sleep-disordered breathing historically relied on male physiology, causing obstructive sleep apnea (OSA) to frequently go unrecognized in women, according to a 2024 study published in the Journal of Clinical Sleep Medicine. One study estimated that 93% of women with moderate to severe sleep apnea remain undiagnosed. Rather than loud snoring, women often report fatigue, insomnia, or morning headaches.
Postmenopausal women face sharply elevated risks; data from the Wisconsin Sleep Cohort Study showed postmenopausal participants had 2.6 times the odds of developing sleep-disordered breathing compared to premenopausal women.
Insomnia impacts women at rates roughly 1.4 times higher than men, with vulnerability peaking during pregnancy and the menopause transition. Restless legs syndrome (RLS), characterized by an uncomfortable nocturnal urge to move the legs, occurs twice as often in women. Pregnant individuals face two to three times the typical risk, particularly during the third trimester, with low iron serving as a frequent contributing factor.
Frequently Asked Questions About Women’s Health and Sleep
How do sleep trackers assist women in monitoring physiological changes?
Consumer sleep technology tracks vital signs that shift alongside female hormones, including nighttime temperature, resting heart rate, heart rate variability (HRV), and respiratory rate. Devices display biometric patterns across the menstrual cycle, pregnancy, and perimenopause, though consumer trackers do not replace formal clinical evaluations.
Why do medical providers often miss obstructive sleep apnea in female patients?
Historical diagnostic standards were built around male physiological presentations, such as loud snoring. Women frequently present with fatigue, morning headaches, or insomnia instead, leading clinicians to attribute these symptoms to stress, aging, or menopause rather than underlying sleep apnea.
What evidence supports behavioral treatments for menopausal insomnia?
Cognitive behavioral therapy for insomnia (CBT-I) demonstrates strong clinical efficacy. A meta-analysis of 11 randomized trials found that CBT-I significantly improved sleep quality and reduced insomnia severity in menopausal women, regardless of whether the therapy was delivered in person, by phone, or online.