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Space Travel's hidden effect on Women's bodies: new study reveals clues

NCT ID NCT06633692

Knowledge-focused Sponsor: Ceren UNAL Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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

Summary

This study looked at how lying with the head tilted down—mimicking the fluid shifts of space—changes blood flow in the uterus and ovaries. Twenty healthy women participated. Researchers used ultrasound to measure blood flow before and during the head-down position. The goal is to better understand how spaceflight might affect women's reproductive health.

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 scientists understand how space travel affects women's reproductive health, guiding future research and safety measures.
What could go wrong
This is a small, early-stage observational study on Earth, not in space. It only measures short-term changes and may not reflect real spaceflight conditions.

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

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

20 people

The number who actually took part.

Started

Dec 2024

Finished

Aug 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 44 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18-44 years old healthy female individuals Exclusion Criteria: * History of hysterectomy and/or oophorectomy * Pregnancy * Premature ovarian insufficiency * Women with reproductive tract pathologies * Cardiovascular diseases

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Conditions

The condition(s) this trial relates to.

ovarian disorder

As listed by the trial registrant

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

Blood flow Microgravity OVARY Uterine

Contacts and locations

Locations

  • Koc Universoty Hospital

    Istanbul, 34010, Turkey (Türkiye)

More trials for these conditions

Other studies related to the condition(s) this trial covers.