FemBloc® Permanent Contraception - Early Pivotal Trial
BLOC
BLOC: Prospective Multi-Center Office Based Bi-Lateral Tubal Occlusion Trial for Female Permanent Contraception
1 other identifier
interventional
240
1 country
12
Brief Summary
Prospective, multi-center, international, non-randomized, two-arm study of subjects undergoing either FemBloc or laparoscopic bilateral tubal sterilization (Control). The FemBloc group total study duration will be approximately 65 months. The laparoscopic tubal sterilization (Control) group total study duration will be approximately 62 months.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for not_applicable
Started Feb 2018
Longer than P75 for not_applicable
12 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
February 1, 2018
CompletedStudy Start
First participant enrolled
February 2, 2018
CompletedFirst Posted
Study publicly available on registry
February 15, 2018
CompletedPrimary Completion
Last participant's last visit for primary outcome
January 31, 2020
CompletedStudy Completion
Last participant's last visit for all outcomes
February 10, 2025
CompletedFebruary 27, 2026
February 1, 2026
2 years
February 1, 2018
February 24, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Incidence of short-term and long-term adverse events in each arm
Safety: Incidence of short-term and long-term adverse events in each arm
1-5 years
Study Arms (2)
FemBloc
EXPERIMENTALInvestigational device and procedure
Control
ACTIVE COMPARATORLaparoscopic bilateral tubal sterilization
Interventions
Treatment with FemBloc for women who desire permanent birth control (female sterilization)
Laparoscopic bilateral tubal sterilization for women who desire permanent birth control (female sterilization)
Eligibility Criteria
You may qualify if:
- Female, 21 - 45 years of age desiring permanent birth control
- Sexually active with male partner
- For FemBloc Arm:
- Regular menstrual cycle for last 3 months or on hormonal contraceptives
- For Control Arm:
- Undergoing planned laparoscopic bilateral tubal sterilization
You may not qualify if:
- Uncertainty about the desire to end fertility
- Known or suspected pregnancy
- Prior tubal surgery, including sterilization attempt
- Prior endometrial ablation
- Presence, suspicion, or previous history of gynecologic malignancy
- Abnormal uterine bleeding requiring evaluation or treatment
- Scheduled to undergo concomitant intrauterine procedures at the time of procedure(s)
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Femasys Inc.lead
Study Sites (12)
New Horizons Clinical Trials
Chandler, Arizona, 85224, United States
Stanford University
Stanford, California, 94305, United States
Altus Research Inc.
Lake Worth, Florida, 33461, United States
Rosemark Womencare Specialists
Idaho Falls, Idaho, 83404, United States
Women's Health Advantage
Fort Wayne, Indiana, 46825, United States
Rutgers, The State University of New Jersey
Newark, New Jersey, 07103, United States
Columbia University Medical Center
New York, New York, 10032, United States
Wake Research Associates, LLC
Raleigh, North Carolina, 27612, United States
University Hospitals Cleveland Medical Center
Beachwood, Ohio, 44122, United States
Amy Brenner MD & Associates
Mason, Ohio, 45069, United States
Chattanooga Medical Research LLC
Chattanooga, Tennessee, 37404, United States
University of Utah
Salt Lake City, Utah, 84132, United States
Related Links
Study Officials
- STUDY DIRECTOR
Sponsor
Medical Affairs & Clinical Development
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- NON RANDOMIZED
- Masking
- NONE
- Purpose
- PREVENTION
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
February 1, 2018
First Posted
February 15, 2018
Study Start
February 2, 2018
Primary Completion
January 31, 2020
Study Completion
February 10, 2025
Last Updated
February 27, 2026
Record last verified: 2026-02