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

Sexual Health Texting Intervention to Support Adolescent Females

NCT02419690
View directory record Official record
Conditions
Teen Sexual Health
Interventions
text message intervention
Behavioral
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
13 Years to 18 Years · Female only
Enrollment
244 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 9, 2020 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional

The Young Woman's Reach Project: Trial of an Intervention to Impact Contraceptive Behavior, Unintended Pregnancy, and Sexually Transmitted Infections (STIs) Among Adolescent Females

NCT00230880
View directory record Official record
Conditions
Contraceptive Behavior, Sexually Transmitted Diseases
Interventions
follow-up phone counseling
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
14 Years to 18 Years · Female only
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2012 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 4 Interventional

Nurse Family Partnership (NFP) Contraceptive Study

NCT00928538
View directory record Official record
Conditions
Pregnancy, Effective Contraceptive Use, Family Planning
Interventions
Enhanced NFP Care
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
15 Years to 45 Years · Female only
Enrollment
344 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
3
States / cities
Olympia, Washington • Seattle, Washington • Vancouver, Washington
Source: ClinicalTrials.gov public record
Updated Mar 29, 2016 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Family Planning-based Partner Abuse Intervention to Reduce Unintended Pregnancy

NCT01459458
View directory record Official record
Conditions
Violence, Pregnancy
Interventions
Family Planning-based Partner Violence Intervention
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
16 Years to 29 Years · Female only
Enrollment
3,687 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 1, 2015 · Synced Jul 23, 2026, 5:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Contraceptive Choice Center

NCT02633631
View directory record Official record
Conditions
Unintended Pregnancy, Contraception, Family Planning
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
14 Years to 45 Years · Female only
Enrollment
2,664 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Long-Acting Reversible Contraception

NCT01299116
View directory record Official record
Conditions
Contraception
Interventions
DMPA, oral contraceptives, Implanon®, ParaGard®, Mirena®
Drug
Lead sponsor
FHI 360
Other
Eligibility
18 Years to 29 Years · Female only
Enrollment
916 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 27, 2018 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Addressing Reproductive Coercion in HEalth Settings - Kenya

NCT03534401
View directory record Official record
Conditions
Unintended Pregnancy, Family Planning, Intimate Partner Violence (IPV)
Interventions
ARCHES Kenya
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
15 Years to 49 Years · Female only
Enrollment
659 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Feb 12, 2023 · Synced Jul 23, 2026, 5:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

KYleena Satisfaction Study / Observational Study on User Satisfaction With the Levonorgestrel Intrauterine Delivery System Kyleena (LNG-IUS 12) in New Contraceptive Users and After Switching From Another Contraceptive Method

NCT03182140
View directory record Official record
Conditions
Contraception
Interventions
Kyleena
Drug
Lead sponsor
Bayer
Industry
Eligibility
Female only
Enrollment
1,134 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
12
States / cities
Lakewood, Colorado • Sarasota, Florida • Wellington, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2021 · Synced Jul 23, 2026, 5:18 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Postplacental Insertion of Levonorgestrel-releasing Intrauterine System (LNG-IUS) After Cesarean vs. Interval Insertion

NCT00635362
View directory record Official record
Conditions
Healthy
Interventions
Levonorgestrel-releasing intrauterine system (LNG-IUS)
Device
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older · Female only
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 4 Interventional Results available

A Pilot Study of Early Postpartum Intrauterine Contraception

NCT00997932
View directory record Official record
Conditions
Unplanned Pregnancy
Interventions
Levonorgestrel-Releasing Intrauterine Contraceptive System (LNG-IUS), 52 Mg, 5 Year Duration
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 28, 2017 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Mid-life Women: Preventing Unintended Pregnancy and STIs

NCT02330133
View directory record Official record
Conditions
Reproductive Health
Interventions
Women's Reproductive Health, Online sexual health content
Behavioral
Lead sponsor
Oregon Center for Applied Science, Inc.
Industry
Eligibility
25 Years to 55 Years · Female only
Enrollment
333 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 31, 2014 · Synced Jul 23, 2026, 5:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Michigan Contraceptive Access, Research, and Evaluation Study Children: Phase 1

NCT04371900
View directory record Official record
Conditions
Pregnancy
Interventions
Mother receives voucher valued at 100% of cost of name-brand IUD (March 4, 2019-March 31, 2023), Mother receives voucher valued at 50% of cost of name-brand IUD (August 26, 2018-March 3, 2019)
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
0 Years to 17 Years
Enrollment
4,700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2049
U.S. locations
9
States / cities
Ann Arbor, Michigan • Detroit, Michigan • Ferndale, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Jovenes Sanos: Preventing IPV and RC

NCT03660514
View directory record Official record
Conditions
Unintended Pregnancy, Family Planning, Intimate Partner Violence (IPV)
Interventions
Jovenes Sanos
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
16 Years to 20 Years · Female only
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 8, 2021 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional

A Pilot Study Using Text Messaging to Communicate With Adolescent Females in the Pediatric Emergency Department

NCT02093884
View directory record Official record
Conditions
Pregnancy
Interventions
Text Messaging Intervention, Standard Referral
Other
Lead sponsor
Columbia University
Other
Eligibility
14 Years to 19 Years · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Manhattan, New York
Source: ClinicalTrials.gov public record
Updated Jan 19, 2017 · Synced Jul 23, 2026, 5:18 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

The Contraceptive Choice Project

NCT01986439
View directory record Official record
Conditions
Unintended Pregnancy, Teen Births, Abortion, Contraception
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
14 Years to 45 Years · Female only
Enrollment
9,256 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 13, 2015 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Maintaining Intrauterine Devices (IUDs) in Teens (MINT): A Randomization Trial

NCT00653159
View directory record Official record
Conditions
Contraception
Interventions
Levonorgestrel-releasing intrauterine device (LNG-IUS), Copper T380A intrauterine device (CuT380A)
Device
Lead sponsor
University of Chicago
Other
Eligibility
14 Years to 18 Years · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Jul 23, 2026, 5:18 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Michigan Contraceptive Access, Research, and Evaluation Study: Phase 1

NCT03673007
View directory record Official record
Conditions
Pregnancy
Interventions
Gift card to be used for contraceptives that is valued at 50% of cost of name-brand IUD (August 26, 2018-March 3, 2019), Gift card to be used for contraceptives that is valued at 100% of cost of name-brand IUD (March 4, 2019-March 31, 2023)
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
4,633 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2028
U.S. locations
9
States / cities
Ann Arbor, Michigan • Detroit, Michigan • Ferndale, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Jul 23, 2026, 5:18 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Optimizing the Floreciendo Sexual and Reproductive Health Workshop for Latina Teens and Female Caregivers: A Pilot

NCT06223165
View directory record Official record
Conditions
Sexual Risk Behavior, Sexually Transmitted Infections, Unplanned Pregnancy
Interventions
Floreciendo (Foundations, Condoms & Contraception, Family Strengthening, and Gender & Relationships), Floreciendo (Foundations, Condoms & Contraception, and Family Strengthening), Floreciendo (Foundations, Condoms & Contraception, Gender & Relationships), Floreciendo (Foundations, Family Strengthening, and Gender & Relationships), Floreciendo (Foundations and Condoms & Contraception), Floreciendo (Foundations and Family Strengthening), Floreciendo (Foundations and Gender & Partner Relationships), Floreciendo (Foundations)
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
14 Years and older
Enrollment
184 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
4
States / cities
Chicago, Illinois • Cicero, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 26, 2025 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Use of Motivational Interviewing to Increase Contraception Use Among Young Women

NCT01881321
View directory record Official record
Conditions
Unplanned Pregnancy
Interventions
Counseling Intervention
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
15 Years to 29 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 29, 2014 · Synced Jul 23, 2026, 5:18 AM EDT
Completed No phase listed Observational

Relationship Between Postpartum Mood Disorders and Delivery Experience

NCT03004872
View directory record Official record
Conditions
Postpartum Period, Depression, Stress Disorders, Post-Traumatic
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older · Female only
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 11, 2019 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Phase 2 Interventional

Project CHOICES Efficacy Study

NCT00153478
View directory record Official record
Conditions
Risk for an Alcohol-Exposed Pregnancy, Hazardous Alcohol Use, Risk for Unintended Pregnancy
Interventions
Brief Motivational Counseling
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years to 44 Years · Female only
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
11
States / cities
Fort Lauderdale, Florida • Dayton, Texas • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2005 · Synced Jul 23, 2026, 5:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

miPlan: A Trial of miPlan Intervention vs. Standard of Care

NCT02396602
View directory record Official record
Conditions
Unintended Pregnancy
Interventions
miPlan intervention
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
15 Years to 29 Years · Female only
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 24, 2016 · Synced Jul 23, 2026, 5:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of the Reliability, Validity, and Acceptability of the London Measure of Unplanned Pregnancy in a U.S. Population of Women

NCT00306007
View directory record Official record
Conditions
Unplanned Pregnancy
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
15 Years to 45 Years · Female only
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 24, 2013 · Synced Jul 23, 2026, 5:18 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Preventing Health Damaging Behaviors in Male and Female Army Recruits

NCT01234103
View directory record Official record
Conditions
Sexually Transmitted Infection (STI) Prevention, Unintended Pregnancy Prevention, Sexual Risk Reduction, Alcohol and Other Substance Use Prevention, Intimate Partner Violence Prevention
Interventions
Preventing Helath Damaging Health Behaviors in Male and Female Army Recruits
Behavioral
Lead sponsor
United States Department of Defense
Federal
Eligibility
18 Years and older
Enrollment
933 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 24, 2017 · Synced Jul 23, 2026, 5:18 AM EDT