Permanent birth control using FemBloc

FINALE: Prospective Multi-Center Trial for FemBloc INtratubal Occlusion for TranscervicAL PErmanent Birth Control

Not applicable Interventional Femasys Inc. · NCT05977751

This study is testing a new method for permanent birth control called FemBloc to see how well it works and is safe for women.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment573 (estimated)
Ages21 Years to 50 Years
SexFemale
SponsorFemasys Inc. Industry-sponsored
Locations8 sites (Chandler, Arizona and 7 other locations)
Trial IDNCT05977751 on ClinicalTrials.gov

What this trial studies

This trial evaluates the effectiveness of FemBloc, a method for permanent birth control, through a prospective, multi-center approach. Participants will undergo the FemBloc procedure followed by an ultrasound confirmation test to ensure the procedure's success. The study is unblinded and single-arm, meaning all participants will receive the same intervention without a control group. It aims to gather data from various international sites to assess the procedure's safety and efficacy.

Who should consider this trial

Good fit: Ideal candidates are women aged 21 to 50 who are sexually active and desire permanent contraception.

Not a fit: Patients who are uncertain about their desire to end fertility or have a history of gynecologic malignancy may not benefit from this study.

Why it matters

Potential benefit: If successful, this could provide a reliable and effective method for women seeking permanent birth control.

How similar studies have performed: Other studies on permanent birth control methods have shown success, indicating that this approach is promising and not entirely novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Female, 21 - 50 years of age desiring permanent birth control.
* Sexually active with male partner.
* Regular menstrual cycle for last 3 months or on hormonal contraceptives.

Exclusion Criteria:

* Uncertainty about the desire to end fertility.
* Known or suspected pregnancy.
* Prior tubal surgery, including sterilization attempt.
* Presence, suspicion, or previous history of gynecologic malignancy.
* Scheduled to undergo concomitant intrauterine procedures (i.e. endometrial ablation) at the time of either FemBloc Treatment or prior to final confirmation test.
* Abnormal uterine bleeding requiring evaluation or treatment.

Where this trial is running

Chandler, Arizona and 7 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions ContraceptionPermanent Birth ControlPermanent ContraceptionPermanent Sterilization
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.