Active — Not RecruitingNot Applicable

Sleep Quality and the Menstrual Cycle

Iceland60 participantsStarted 2025-03-01

Plain-language summary

This study aims to examine how ovarian hormone fluctuations across the menstrual cycle affect sleep patterns. Using objective sleep tracking, hormone phase assessment, and validated questionnaires, it will assess changes in sleep quality, duration, menstrual symptoms, sleepiness, chronotype, anxiety, and depression over one full cycle.

Who can participate

Age range18 Years – 36 Years

SexFEMALE

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Inclusion criteria

✓. Women, 18-36 years
✓. Body Mass Index (BMI) \<=35
✓. Regular menstrual cycle, defined as: length of menstrual cycle 22-35 days and length of menses \<10 days.
✓. Women with natural menstrual cycle (i.e., do not use any type of hormonal contraceptives) and women using contraceptives (comparison group).

Exclusion criteria

✕. Sleep apnea, clinical insomnia, restless leg syndrome, narcolepsy.
✕. Shift work and trans-meridian travel during the study period.
✕. Chronic atrial fibrillation or ventricular trigemini, severe uncontrolled asthma, or other pulmonary diseases.
✕. Premenstrual Dysphoric Disorder (PMDD) or severe Premenstrual Syndrome (PMS).
✕. Other severe medical conditions that may affect cerebral metabolism, cancer, diabetes, rheumatoid arthritis, or other chronic health conditions.
✕. Severe psychiatric conditions, Major Depressive disorder, Generalized Anxiety Disorder, Bipolar Disorder, Personality Disorder, OCD, Schizophrenia.
✕. Severe neurological conditions, epilepsy, traumatic brain injury, and previous neurosurgery.
✕. Habitual smokers and other habitual substance abuse or dependence on substances.

What they're measuring

Sleep duration

Timeframe: From March 15 2025 to January 15 2026

Sleep quality

Timeframe: From March 15 2025 to January 15 2026

Trial details

NCT IDNCT06906133

SponsorUniversity of Akureyri

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2025-12-31

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