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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Emergency Contraception Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Postpartum Care Timing: A Randomized Trial

NCT03733405
View directory record Official record
Conditions
Postpartum, Pregnancy Related
Interventions
Postpartum Visit at 6 Weeks, Postpartum Visit at 2 Weeks
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
256 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Emergency Contraception and Body Weight: Pilot Study

NCT02408692
View directory record Official record
Conditions
Contraception, Body Weight
Interventions
ECx1, ECx2
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 24, 2017 · Synced Jul 23, 2026, 11:24 PM EDT
Recruiting Phase 4 Interventional

Levonorgestrel 52 mg IUD for Emergency Contraception and Same-Day Start

NCT05444582
View directory record Official record
Conditions
Contraception
Interventions
Levonorgestrel 52 MG Intrauterine System
Drug
Lead sponsor
University of Utah
Other
Eligibility
16 Years to 35 Years · Female only
Enrollment
1,404 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
8
States / cities
San Jose, California • Denver, Colorado • Chicago, Illinois + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 4 Interventional Results available

RAPID EC - Rct Assessing Pregnancy With Intrauterine Devices for EC

NCT02175030
View directory record Official record
Conditions
Contraception
Interventions
Copper IUD, Levonorgestrel IUD
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
711 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
6
States / cities
Logan, Utah • Ogden, Utah • Orem, Utah + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2022 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Phase II Study of Ovulation in Obese Women

NCT06306131
View directory record Official record
Conditions
Pregnancy Prevention
Interventions
Levonorgestrel 1.5 milligram, Meloxicam 15 milligram, calcium carbonate 750 milligram
Drug · Other
Lead sponsor
InnovaGyn, Inc.
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CDB-2914 for Emergency Contraception

NCT00411684
View directory record Official record
Conditions
Emergency Contraception
Interventions
CDB-2914
Drug
Lead sponsor
HRA Pharma
Industry
Eligibility
18 Years and older · Female only
Enrollment
1,623 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
17
States / cities
San Jose, California • Denver, Colorado • Miami, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Sep 20, 2021 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Efficacy Trial of CDB 2914 for Emergency Contraception

NCT00271583
View directory record Official record
Conditions
Emergency Contraception
Interventions
CDB-2914, levonorgestrel
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older · Female only
Enrollment
1,672 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2001
U.S. locations
6
States / cities
Los Angeles, California • Denver, Colorado • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2007 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study of the Drug Interactions Between a Hormonal Emergency Contraception and an HIV Medication

NCT00482963
View directory record Official record
Conditions
HIV Infections, Contraception, Pharmacokinetics
Interventions
levonorgestrel, efavirenz
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
2
States / cities
Denver, Colorado • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jul 14, 2013 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effectiveness of Orally Dosed Emergency Contraception in Obese Women - LNG

NCT02863445
View directory record Official record
Conditions
Obesity
Interventions
Levonorgestrel-based emergency contraception 1.5 mg, Levonorgestrel-based emergency contraception 3.0mg
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 14, 2023 · Synced Jul 23, 2026, 11:24 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Copper T380A IUD vs. Oral Levonorgestrel for Emergency Contraception

NCT00966771
View directory record Official record
Conditions
Pregnancy
Interventions
Copper T380 IUD, Oral levonorgestrel
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
548 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
2
States / cities
Salt Lake City, Utah • West Valley City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 5, 2017 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Not applicable Interventional

Advanced Provision of Emergency Contraception: Utilizing Technology to Increase Prescription Fill Rates

NCT01401816
View directory record Official record
Conditions
Sexually Active
Interventions
Text Message
Other
Lead sponsor
Boston Medical Center
Other
Eligibility
13 Years to 21 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 9, 2012 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Targeted Video Messaging About Emergency Contraception

NCT03774368
View directory record Official record
Conditions
Contraception
Interventions
Emergency contraception website, Emergency contraception video
Other
Lead sponsor
Planned Parenthood League of Massachusetts
Other
Eligibility
18 Years to 29 Years · Female only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 15, 2019 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CDB-2914 in Comparison to Levonorgestrel for Emergency Contraception

NCT00551616
View directory record Official record
Conditions
Contraception
Interventions
CDB-2914, Levonorgestrel
Drug
Lead sponsor
HRA Pharma
Industry
Eligibility
16 Years and older · Female only
Enrollment
2,221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
23
States / cities
Los Angeles, California • Santa Monica, California • Boulder, Colorado + 18 more
Source: ClinicalTrials.gov public record
Updated May 2, 2022 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Phase 2 Interventional Results available

Pharmacokinetic Study to Evaluate Double-Dose Levonorgestrel Emergency Contraception in Combination With Efavirenz-Based Antiretroviral Therapy or Rifampicin-Containing Anti-Tuberculosis Therapy

NCT03819114
View directory record Official record
Conditions
HIV Infections, Tuberculosis
Interventions
Levonorgestrel (LNG)
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
16 Years and older · Female only
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
7
States / cities
Chicago, Illinois • New York, New York • Chapel Hill, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 26, 2021 · Synced Jul 23, 2026, 11:24 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Etonogestrel Implant as Emergency Contraception

NCT05237141
View directory record Official record
Conditions
Contraception
Interventions
Etonogestrel implant
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Reducing Teen Pregnancy in the Emergency Department

NCT03866811
View directory record Official record
Conditions
Reproductive Behavior, Sexual Behavior, Adolescent Behavior, Contraception
Interventions
Dr. Erica
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
14 Years to 19 Years · Female only
Enrollment
146 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 5, 2024 · Synced Jul 23, 2026, 11:24 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Non-Invasive Sexually Transmitted Disease Testing in Women Seeking Emergency Contraception or Urine Pregnancy Testing

NCT00978848
View directory record Official record
Conditions
Trichomonas Vaginitis, Chlamydia Trachomatis, Neisseria Gonorrhoeae Infection
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
15 Years and older · Female only
Enrollment
305 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 17, 2016 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Early Phase 1 Interventional Results available

Ovarian Function With ENG Implant and UPA Use

NCT04291001
View directory record Official record
Conditions
Contraception
Interventions
ENG implant, oral ulipristal acetate
Device · Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 11, 2024 · Synced Jul 23, 2026, 11:24 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Disparities in Emergency Contraceptive Metabolism Dictate Efficacy

NCT05674513
View directory record Official record
Conditions
Contraceptive Usage
Interventions
Ulipristal acetate
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Not applicable Interventional

Randomized Trial of Advanced Provision Emergency Contraception Among Women With Gonorrhea or Chlamydia

NCT00520455
View directory record Official record
Conditions
Pregnancy
Interventions
levonorgestrel 0.75mg taken twice 12 hours apart (Plan B) and condoms
Drug
Lead sponsor
University of Washington
Other
Eligibility
16 Years to 60 Years · Female only
Enrollment
177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 14, 2007 · Synced Jul 23, 2026, 11:24 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Safety, Tolerability, and Efficacy of ellaOne® (Ulipristal Acetate) for Emergency Contraception in Postmenarcheal Adolescent Girls and Women

NCT01107106
View directory record Official record
Conditions
Contraception
Interventions
ellaOne® (ulipristal acetate)
Drug
Lead sponsor
HRA Pharma
Industry
Eligibility
Female only
Enrollment
579 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
4
States / cities
Denver, Colorado • Lakewood, Colorado • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 14, 2013 · Synced Jul 23, 2026, 11:24 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Etonogestrel (ENG) Implant Insertion for Emergency Contraception With Oral Levonorgestrel (LNG) vs Placebo

NCT06162611
View directory record Official record
Conditions
Emergency Contraception
Interventions
Etonogestrel implant with Oral Levonorgestrel emergency contraception 1.5mg, Etonogestrel implant with oral placebo
Drug · Device
Lead sponsor
Lori Gawron
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
790 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Jul 23, 2026, 11:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Levonorgestrel Intrauterine System For Emergency Contraception

NCT01539720
View directory record Official record
Conditions
Pregnancy, Unplanned, Pregnancy; Accident
Interventions
Ulipristal acetate, levonorgestrel IUS
Drug · Device
Lead sponsor
Planned Parenthood of the St. Louis Region and Southwest Missouri
Other
Eligibility
14 Years to 45 Years · Female only
Enrollment
274 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2018
U.S. locations
3
States / cities
Atlanta, Georgia • Indianapolis, Indiana • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 19, 2024 · Synced Jul 23, 2026, 11:24 PM EDT
Completed No phase listed Observational Results available

Same Day Oral EC and Implant Initiation

NCT04678817
View directory record Official record
Conditions
Contraception
Interventions
Etonogestrel contraceptive implant with oral levonorgestrel, Levonorgestrel intrauterine device, Copper T380A intrauterine device
Device
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
306 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
2
States / cities
Salt Lake City, Utah • West Valley City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 14, 2025 · Synced Jul 23, 2026, 11:24 PM EDT