Public Release:  Delayed sleep phase syndrome linked to irregular menstrual cycles, premenstrual symptoms in women

American Academy of Sleep Medicine

WESTCHESTER, Ill. - Women with delayed sleep phase syndrome are more likely to report irregular menstrual cycles and premenstrual symptoms, according to a research abstract that will be presented on Tuesday at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS).

The study, authored by Kari Sveum, of Northwestern University in Chicago, Ill., focused on 13 females with delayed sleep phase syndrome and 13 healthy controls. The subjects responded to a questionnaire regarding their reproductive health, including irregularity of their cycle and premenstrual symptoms, either in the past or present.

According to the results, twice as many subjects with delayed sleep phase syndrome reported an irregular menstrual cycle compared to controls. For those not using birth control, three times as many subjects with delayed sleep phase syndrome reported irregular menstruation, compared to controls. Pre-menstrual problems, such as cramps and mood swings, were reported by 69 percent of those with delayed sleep phase syndrome, compared to 16.67 percent of controls.

"While the data is preliminary, these results suggest that women with delayed sleep phase syndrome may be at increased risk for menstrual irregularity associated with circadian misalignment," said Sveum. "Further investigation with a larger group of subjects using prospective diary data would be useful to further establish the effects of circadian disruption on reproductive cycles in women with delayed sleep phase syndrome."

Sleep plays a vital role in promoting a woman's health and well being. Getting the required amount of sleep is likely to enhance a woman's overall quality of life. Yet, women face many potential barriers - such as life events, depression, illness, and medication use - that can disrupt and disturb her sleep.

The hormonal and physical changes that occur during and after menopause can also affect a woman's sleep. Sleep disturbances are more common, and sleep quality can decline. Insomnia related to menopause often occurs.

Obstructive sleep apnea (OSA) is much more common in postmenopausal women. This increase may be due in part to menopause-related weight gain. But it also appears to be hormone-related. Estrogen seems to help protect women against OSA.

It is recommended that women get between seven and eight hours of nightly sleep.

The following tips are provided by the American Academy of Sleep Medicine (AASM) to help women get the most out of their sleep:

  • Make your bedroom a comfortable and safe place. Reduce noises and extreme temperatures that might disturb you.

  • Use light and comfortable bed linens and garments.

  • Go to bed only when you are sleepy and use the bed only for sleeping and sex.

  • Begin rituals to help you relax at bedtime, such as taking a soothing bath or enjoying a light snack.

  • Go to bed and get up at the same time every day, including weekends and holidays.

  • If you need to take a nap, keep it to less than one hour and take it before 3 p.m.

  • Only drink caffeine in the morning, and avoid alcohol and cigarettes late in the day.

  • Stay away from fatty, spicy foods that are likely to upset your stomach or cause heartburn.

  • Set aside time during the day to get all of your worries out of your system.

  • Increase vitamin E in your diet, or take a vitamin E supplement.

  • Hormone replacement therapy may help you sleep better by relieving severe hot flashes related to menopause. Ask your doctor for advice about this kind of treatment.

  • Only use sleeping pills when supervised by a doctor.

Those who suspect that they might be suffering from a sleep disorder are encouraged to consult with their primary care physician or a sleep specialist.

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More information on "women and sleep" is available from the AASM at http://www.SleepEducation.com/Topic.aspx?id=67.

The annual SLEEP meeting brings together an international body of 5,000 leading researchers and clinicians in the field of sleep medicine to present and discuss new findings and medical developments related to sleep and sleep disorders.

More than 1,000 research abstracts will be presented at the SLEEP meeting, a joint venture of the AASM and the Sleep Research Society. The three-and-a-half-day scientific meeting will bring to light new findings that enhance the understanding of the processes of sleep and aid the diagnosis and treatment of sleep disorders such as insomnia, narcolepsy and sleep apnea.

SleepEducation.com, a patient education Web site created by the AASM, provides information about various sleep disorders, the forms of treatment available, recent news on the topic of sleep, sleep studies that have been conducted and a listing of sleep facilities.

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