The Gender Sleep Gap: Why Women Sleep Worse
Large epidemiological studies consistently find that women report worse sleep quality than men despite sleeping slightly longer. The National Sleep Foundation's 2022 Women and Sleep Report found that 67% of women reported sleep problems at least a few nights per week. This gap is driven by hormonal variability, higher rates of anxiety and depression, greater caregiver burden, and biological differences in sleep architecture.
Hormonal Transitions Across Life
Women experience four major hormonal transitions that affect sleep: puberty, the monthly menstrual cycle, pregnancy, and menopause. Each involves changes in oestrogen and progesterone that alter circadian rhythms, body temperature regulation, REM sleep percentage, and sleep continuity. No equivalent hormonal variability exists in male biology, which partly explains the persistent gender sleep gap.
A 2023 study in the journal Sleep found that women showed significantly greater sleep disruption during the premenstrual phase and the perimenopause transition than during stable hormonal periods, confirming a direct link between ovarian hormone levels and objective polysomnographic sleep measures.
Sleep Apnoea in Women: The Missed Diagnosis
Sleep apnoea is underdiagnosed in women because it presents differently. Men typically snore loudly and stop breathing visibly. Women more often experience atypical symptoms including insomnia, morning headaches, excessive daytime fatigue, depression, and restless sleep without obvious snoring. Studies show women with sleep apnoea wait an average of 6 years longer than men to receive a diagnosis.
Restless Leg Syndrome
RLS is approximately twice as common in women as in men. It is strongly associated with iron deficiency, which is endemic in women of reproductive age due to menstrual blood loss. Pregnancy further elevates RLS risk, with up to 26% of pregnant women experiencing it in the third trimester. Checking serum ferritin levels (ideal above 75 ng/mL for RLS) is the first diagnostic step.
Pregnancy Sleep
Sleep changes dramatically across pregnancy trimesters. The first trimester brings fatigue and frequent urination. The second offers a relative improvement. The third trimester is the most disruptive, with back pain, foetal movement, heartburn, and high RLS rates combining to significantly reduce sleep quality. Safe sleep positions (left lateral), pillow support between the knees, and managing heartburn with diet and positioning are the most evidence-supported interventions.
Menopause and Sleep
The perimenopausal and postmenopausal years bring a convergence of sleep disruptors: vasomotor symptoms (hot flushes and night sweats) disrupt sleep in 60 to 80% of menopausal women, oestrogen loss removes its protective effect on sleep architecture, and depression risk rises. Cognitive behavioural therapy for insomnia (CBT-I) has strong evidence for menopausal insomnia and is recommended as first-line treatment before hypnotic medications.
- 1Menstruation: NSAID before bed on cramp nights, heat pad, cool bedroom temperature
- 2Pregnancy: left lateral sleep position, pillow between knees, manage heartburn before bed
- 3Perimenopause: CBT-I therapy, cool bedroom, moisture-wicking bedding, discuss HRT with GP
- 4Any stage: Check serum ferritin if experiencing restless legs, especially if periods are heavy
- 5Any stage: Screen for sleep apnoea if experiencing morning headaches, fatigue, or depression
- 6Any stage: Address anxiety before bed with structured worry journaling or brief meditation