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Pregnancy pollution link? new study probes environmental cancer risks

NCT ID NCT05746169

Knowledge-focused Sponsor: University of California, San Francisco 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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

The DREAM study is an observational research project that enrolled over 1,500 pregnant women and their children to understand how exposure to environmental chemicals—like those in consumer products, air, and water—might influence cancer risk. Researchers collected blood, urine, and other samples to measure chemical levels and immune changes. The study was terminated early, so findings may be limited.

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 identify which environmental exposures during pregnancy increase cancer risk, guiding future prevention strategies.
What could go wrong
This is an observational study that was terminated early, so results may be limited. It does not test any treatment or intervention.

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

1,576 people

The number who actually took part.

Started

Sep 2021

Finished

Jul 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.

Who is studied

Pregnant women and their children

Ages

18 years and older

Sex

Anyone

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: * Pregnant women, over the age of 18 years. * English or Spanish-speaking. * Children born of participants enrolled during pregnancy will be enrolled in the DREAM cohort. * Inclusion criterion for the DREAM Cohort Ambassador Program is limited to research participants in the DREAM Cohort. Exclusion Criteria: * Women under the age of 18. * Women expecting the birth of multiples (twins, triplets, etc.).

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Conditions

The condition(s) this trial relates to.

cancer neoplasm

As listed by the trial registrant

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

Cancer

Contacts and locations

Locations

  • Fresno Community Regional Medical Center

    Fresno, California, 93721, United States

  • University of California, Berkeley

    Berkeley, California, 94720, United States

  • University of California, San Francisco

    San Francisco, California, 94143, United States

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