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Can a simple pill replace abortion for late periods?

NCT ID NCT04940013

Symptom relief Sponsor: University of California, San Francisco 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

This study tested how acceptable it is to use misoprostol alone to start a late period. It included 17 adults whose period was up to 14 days late. The goal was to see if people were satisfied with this approach and if it worked to bring on their period.

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

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

17 people

The number who actually took part.

Started

Oct 2021

Finished

Sep 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 years and older

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: * Be 18 years old or older * Read and speak English * Know the date of their last menstrual period within 2 days * Have a period that is late by up to 14 days * Have had regular periods in the last 4-6 months * Does not want to be pregnant; understand that if they are pregnant, the pills will end their pregnancy * Be willing to have an abortion if the missed period pill does not work, and informed of potential for birth defects in any ongoing pregnancy * Does not want to verify pregnancy status * Does not have risk factors for ectopic pregnancy (history of ectopic pregnancy, recent vaginal bleeding or spotting, pelvic pain on one side, prior permanent contraception, or other tubal surgery) * Does not have an IUD * Does not currently use a contraceptive implant or injectable * Does not have contraindications to misoprostol * Agree to participate in the follow up visit/call Exclusion Criteria: * Participants who have contraindications to misoprostol * Unknown date of last menstrual period * Risk factors for ectopic pregnancy (history of ectopic pregnancy, recent vaginal bleeding or spotting, pelvic pain on one side, prior permanent contraception, or other tubal surgery) * Irregular menses or any other condition that in the opinion of the Principal Investigator would compromise participant safety.

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Conditions

The condition(s) this trial relates to.

menstrual disorder Menstruation Disturbances

As listed by the trial registrant

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

Menstrual irregularity Menstrual regulation

Contacts and locations

Locations

  • University of California, San Francisco

    Fresno, California, 93701, United States

More trials for these conditions

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