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Tiny pollution particles found in fetal lungs?

NCT ID NCT04068389

Knowledge-focused Sponsor: University Hospital, Bordeaux Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study examined whether tiny air pollution particles inhaled by a pregnant woman can cross the placenta and reach her unborn baby's lungs. Researchers collected lung tissue from 62 fetuses after medical termination of pregnancy (over 22 weeks) and used electron microscopy to check for particles. The goal is to understand how early in life pollution exposure may begin.

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 it shows particles reach fetal lungs, it could highlight the need to protect pregnant women from air pollution.
What could go wrong
This is a small, completed observational study with no intervention. Results may not apply to all pregnancies or pollution types.

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.

Participants

62 people

The number who actually took part.

Started

Dec 2009

Finished

Nov 2012

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.

Who is studied

Women with a medical termination of pregnancy

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Female participants only

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: \- All women volunteers for whom a medical termination of pregnancy is proposed for a fetus older than 22 weeks (weight over 500g). Exclusion Criteria: * Refusal of participation of the patient. * Fetus with malformation syndrome affecting pulmonary perfusion.

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Conditions

The condition(s) this trial relates to.

Premature Birth

As listed by the trial registrant

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

Lung; premature Pollution; exposure

More trials for these conditions

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