Women's cycle phase linked to mountain sickness risk
NCT ID NCT06499714
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether the phase of a woman's menstrual cycle affects her chances of getting acute mountain sickness (AMS) when traveling to high altitude. Researchers followed 91 healthy women as they spent two days at 3600 meters (about 11,800 feet). The goal was to see if cycle phase influences AMS symptoms like headache and nausea.
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 study could help women plan high-altitude travel to reduce their risk of altitude sickness based on their menstrual cycle phase.
- What could go wrong
- This is an observational study, not a treatment trial. Results may not apply to women on hormonal contraceptives or with irregular cycles.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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National Center for Cardiology and Internal Medicine
Bishkek, Bishkek, 720040, Kyrgyzstan
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