Women should get at least seven hours of sleep per night, with most adults doing best in the range of seven to nine hours. That target comes from both the National Sleep Foundation and the American Academy of Sleep Medicine, and it applies to all healthy adults ages 18 to 60. But women face a unique set of biological factors that can make hitting that target harder, and at certain life stages, they may need more sleep than the standard recommendation suggests.
The Baseline Recommendation
For adults, seven to nine hours is the sweet spot. For older adults (65 and up), the range narrows slightly to seven to eight hours. Sleeping six hours or fewer on a regular basis is considered inadequate to sustain health and safety. There’s no firm upper limit, though. Sleeping more than nine hours can be appropriate for young adults, people recovering from a stretch of poor sleep, or anyone dealing with illness.
Women tend to sleep slightly longer than men on average, about 11 minutes more per night. That may sound trivial, but it reflects a real biological difference. Women’s internal body clocks run about six minutes shorter than men’s, which shifts the timing of their sleep-wake signals earlier. This means women’s bodies start producing melatonin and dropping in core temperature sooner in the evening, nudging them toward an earlier bedtime and, in many cases, slightly more total sleep.
Why Women Often Need More Sleep
The seven-to-nine-hour recommendation is sex-neutral, but women’s sleep needs fluctuate more than men’s because of hormonal shifts that occur across the menstrual cycle, during pregnancy, and through menopause. These aren’t minor inconveniences. They alter sleep architecture at a chemical level, and they help explain why women are significantly more likely to experience sleep problems. CDC data shows that 17.1% of women have trouble falling asleep compared to 11.7% of men, and 20.7% of women have trouble staying asleep compared to 14.7% of men.
Sleep and the Menstrual Cycle
During the week before menstruation, progesterone levels rise sharply. Progesterone has a sedating effect in moderate amounts, but the rapid hormonal shift can disrupt sleep quality even when total hours seem adequate. Women with severe premenstrual symptoms produce less melatonin during this phase and have a blunted response to whatever melatonin their bodies do make. The result is a window of several days each month where falling asleep and staying asleep becomes genuinely harder.
If you consistently feel more tired or sleep-deprived in the days before your period, it’s not in your head. Your body is working with less of the hormone that regulates your sleep-wake cycle. Building in an extra 30 to 60 minutes of sleep opportunity during that week can help compensate.
Sleep During Pregnancy
Pregnancy increases the need for sleep while simultaneously making it harder to get. In the first trimester, a spike in progesterone causes significant daytime drowsiness. Many women find they need nine or more hours just to feel functional. By the third trimester, the obstacles shift: a growing belly makes comfortable positions hard to find, frequent urination interrupts sleep, and rising estrogen levels can cause nasal tissue swelling that leads to snoring or even obstructive sleep apnea.
The stakes are higher during pregnancy, too. Research from Johns Hopkins Medicine links sleeping fewer than six hours in a 24-hour period to increased risks of preeclampsia, gestational diabetes, longer labors, and higher rates of cesarean delivery. Naps count toward total sleep time, so if nighttime sleep is fragmented, daytime rest isn’t just a luxury.
Sleep During and After Menopause
The menopausal transition is one of the most disruptive periods for women’s sleep. As the ovaries produce less estrogen and progesterone, both hormones that support sleep quality, the effects show up in measurable ways. Lower estrogen levels are associated with more nighttime awakenings, more early morning awakenings, and lower overall sleep efficiency (the percentage of time in bed actually spent sleeping). Low progesterone is linked to sleep-disordered breathing and increased insomnia.
What makes menopause particularly challenging is that it’s not just about low hormone levels. Research published in the Journal of the Endocrine Society found that the rate of change in estrogen matters more than the absolute level. Rapid fluctuations during perimenopause are more strongly associated with sleeping problems than simply having low estrogen. This helps explain why women in the transition phase (typically their late 40s to mid-50s) often sleep worse than postmenopausal women whose hormone levels have stabilized at a lower baseline.
Women approaching menopause also show measurably shorter sleep times and lower sleep efficiency during the final week of their menstrual cycle compared to earlier in the cycle, a pattern that intensifies as they get closer to menopause itself.
What Happens When Women Don’t Sleep Enough
Chronic short sleep carries health risks for everyone, but research has quantified some of the specific consequences for women. A Harvard study of women’s sleep patterns found that sleeping five hours or less per night was associated with a 30% increase in the risk of coronary heart disease. Sleeping six hours carried an 18% increase. Those numbers represent meaningful jumps in cardiovascular risk from losing just one or two hours of sleep below the recommended minimum.
Beyond heart disease, insufficient sleep affects blood sugar regulation, immune function, mood stability, and cognitive performance. For women who are already managing hormonal fluctuations that compromise sleep quality, the gap between adequate and inadequate sleep can be narrower than it seems.
Caregiving and the Sleep Gap
Biology isn’t the only reason women sleep less than they need. Women are more likely to hold unpaid caregiving roles, caring for children, aging parents, or both, and this directly cuts into sleep. CDC-funded research on women who balanced paid work with unpaid caregiving found that those caring for children or elderly family members reported both shorter sleep and poorer sleep quality than women without caregiving duties. Women who shouldered all three roles (paid work, childcare, and elder care) fared worst.
Over time, taking on elder caregiving responsibilities was associated with worsening sleep, suggesting the effect isn’t just an adjustment period. If you’re in a caregiving role and consistently getting under seven hours, the deficit is likely compounding rather than something your body adapts to.
Practical Ways to Protect Your Sleep
The seven-to-nine-hour target works as a general guide, but the right number for you depends on how you feel and function. If you wake without an alarm and feel alert within 15 to 20 minutes, you’re likely getting enough. If you need caffeine to function or feel drowsy during low-stimulation activities like reading or driving, you probably need more.
A few strategies that account for women’s specific sleep challenges: track your cycle and plan for slightly more sleep time in the week before your period. During pregnancy, count naps as part of your total sleep and prioritize them when nighttime sleep is fragmented. During perimenopause, consistency matters more than duration. Going to bed and waking at the same time helps stabilize a circadian rhythm that fluctuating hormones are already destabilizing. And if you’re a caregiver, treating sleep as non-negotiable rather than as the thing that absorbs whatever time is left can prevent a slow slide into chronic deprivation.