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Massive study tracks tiny babies to unlock secrets of early development

NCT ID NCT00009633

Knowledge-focused Sponsor: NICHD Neonatal Research Network Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 Jul 02, 2026 · Updated 2 times

Summary

This study follows thousands of very low birth-weight and premature infants to track their development over time. Researchers collect data on pregnancy, birth, and early childhood outcomes to identify factors that influence brain and body development. No treatments are tested—this is purely an observational registry to guide future research.

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

About 68,000 people

The number the study aims to enrol. It can still change while the study runs.

Started

Apr 1993

Expected to finish

Mar 2030

An estimate. End dates often move.

Lead sponsor

A research network

The lead sponsor is a research network or cooperative group.

Who can take part

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

Who is studied

Infants born at 401-1000 grams birth weight and/or \<29 weeks gestational age

Ages

18 to 26 months

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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.

* Infants inborn at NRN centers * \<27 weeks gestational age * Infants enrolled in one or more additional NICHD NRN Follow-up studies. For infants that do not meet the inclusion criteria above, inclusion and exclusion criteria are determined by the criteria for the additional trial(s). In these cases, infants that are larger than 1,000 grams and/or older than 27 weeks may be included in the FU Study. Note: These inclusion criteria were changed as of 1/1/2008. Prior to this date, infants with birth weights between 401 and 1500 grams who were admitted to NRN NICUs within 14 days of birth were included in the database.

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Conditions

The condition(s) this trial relates to.

fetal growth restriction Premature Birth

As listed by the trial registrant

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

Infant, low birth weight Infant, newborn Infant, premature Infant, small for gestational age

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    19 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Brown University, Women & Infants Hospital of Rhode Island

    ACTIVE_NOT_RECRUITING

    Providence, Rhode Island, 02905, United States

  • Case Western Reserve University, Rainbow Babies and Children's Hospital

    RECRUITING

    Cleveland, Ohio, 44106, United States

  • Children's Mercy Hospital

    RECRUITING

    Kansas City, Missouri, 64108, United States

  • Cincinnati Children's Medical Center

    RECRUITING

    Cincinnati, Ohio, 45267, United States

  • Duke University

    RECRUITING

    Durham, North Carolina, 27710, United States

  • Emory University

    RECRUITING

    Atlanta, Georgia, 30303, United States

  • George Washington University

    COMPLETED

    Washington D.C., District of Columbia, 20052, United States

  • Harvard University

    COMPLETED

    Cambridge, Massachusetts, 02138, United States

  • Indiana University

    RECRUITING

    Indianapolis, Indiana, 46202, United States

  • Northwestern Lurie Children's Hospital of Chicago

    NOT_YET_RECRUITING

    Chicago, Illinois, 60611, United States

  • RTI International

    ACTIVE_NOT_RECRUITING

    Durham, North Carolina, 27705, United States

  • Research Institute at Nationwide Children's Hospital

    ACTIVE_NOT_RECRUITING

    Columbus, Ohio, 43205, United States

  • Sharp Mary Birch Hospital for Women & Newborns

    NOT_YET_RECRUITING

    San Diego, California, 92123, United States

  • Stanford University

    RECRUITING

    Palo Alto, California, 94304, United States

  • Tufts Medical Center

    COMPLETED

    Boston, Massachusetts, 02111, United States

  • University of Alabama at Birmingham

    RECRUITING

    Birmingham, Alabama, 35233, United States

  • University of California - Los Angeles

    RECRUITING

    Los Angeles, California, 90025, United States

  • University of California at San Diego

    COMPLETED

    San Diego, California, 92103-8774, United States

  • University of Iowa

    RECRUITING

    Iowa City, Iowa, 52242, United States

  • University of Miami

    COMPLETED

    Miami, Florida, 33136, United States

  • University of Mississippi Medical Center - Children's of Mississippi

    NOT_YET_RECRUITING

    Jackson, Mississippi, 39216, United States

  • University of New Mexico

    RECRUITING

    Albuquerque, New Mexico, 87131, United States

  • University of Pennsylvania

    RECRUITING

    Philadelphia, Pennsylvania, 19104, United States

  • University of Rochester

    ACTIVE_NOT_RECRUITING

    Rochester, New York, 14642, United States

  • University of Tennessee

    COMPLETED

    Memphis, Tennessee, 38163, United States

  • University of Texas Health Science Center at Houston

    RECRUITING

    Houston, Texas, 77030, United States

  • University of Texas Southwestern Medical Center at Dallas

    RECRUITING

    Dallas, Texas, 75235, United States

  • University of Utah

    RECRUITING

    Salt Lake City, Utah, 84108, United States

  • Wake Forest University

    COMPLETED

    Charlotte, North Carolina, 27157, United States

  • Wayne State University

    RECRUITING

    Detroit, Michigan, 48201, United States

  • Yale University

    COMPLETED

    New Haven, Connecticut, 06504, United States

More trials for these conditions

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