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Decades-Old study reveals secrets of fertility and pregnancy health

NCT ID NCT04595760

Knowledge-focused Sponsor: National Institute of Environmental Health Sciences (NIEHS) 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 02, 2026 · Updated 6 times

Summary

This study looks at old data from 221 women who took part in a pregnancy study in the 1980s. Researchers want to learn how things like lifestyle, drug use, and pollution affect fertility, pregnancy, and pregnancy loss. No new participants are needed, and the study only uses existing information and urine samples.

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

231 people

The number who actually took part.

Started

Oct 2020

Expected to finish

Dec 2030

An estimate. End dates often move.

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

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 who participated in the 1982-1986 North Carolina Early Pregnancy Study (EPS)

Ages

21 to 42 years

Sex

Female participants only

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.

* INCLUSION CRITERIA: * healthy white women aged 21-42 who were planning to become pregnant -women enrolled in the 1982-1986 North Carolina Early Pregnancy Study (EPS) at the time they discontinued all methods of birth control

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Conditions

The condition(s) this trial relates to.

Abortion, Spontaneous

As listed by the trial registrant

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

Conception Early pregnancy loss Menstrual cycles Pregnancy outcomes

Contacts and locations

Locations

  • National Institute of Environmental Health Sciences (NIEHS)

    Bethesda, Maryland, 20892, United States

More trials for these conditions

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