Mountain air and menstrual cycles: new study on sleep breathing

NCT ID NCT06498544

Completed Knowledge-focused Sponsor: University of Zurich Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at how sleeping at high altitude (3600 m) affects breathing in healthy women, and whether the phase of their menstrual cycle makes a difference. 91 women spent two nights at altitude while their oxygen levels and breathing patterns were measured. The goal was to see if sleep-disordered breathing changes depending on where they are in their cycle.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this could help understand why some women have more breathing problems during sleep at high altitudes, potentially guiding future travel or health advice.
What could go wrong: This is a small, completed observational study, not a treatment trial. Results may not apply to all women or to real-world conditions outside the lab.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Hypoxia sleep apnea syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

SLEEP DISORDERED BREATHING

Contacts and locations

Locations

National Center for Cardiology and Internal Medicine

Bishkek, Bishkek, 720040, Kyrgyzstan

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