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FemBloc® Permanent Contraception - Confirmation Feasibility Trial

BLOC: Prospective, Multi-Center, Study of Subjects Undergoing FemBloc Permanent Contraception With Two Confirmation Procedures (FemBloc With FemChec and Fluoro HSG)

Status
Active, not recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04273594
Acronym
BLOC
Enrollment
45
Registered
2020-02-18
Start date
2020-02-27
Completion date
2027-04-30
Last updated
2025-01-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Contraception

Keywords

permanent contraception, birth control, pregnancy prevention

Brief summary

The trial objectives include evaluating the adequacy of proposed mitigations for the previous pivotal trial of the FemBloc Permanent Contraceptive System and validating the confirmation procedure by comparing FemChec (ultrasound) to fluoroscopic hysterosalpingogram (fluoro HSG) for post-occlusion in the same patient.

Interventions

DEVICEFemBloc

Treatment with FemBloc for women who desire permanent birth control (female sterilization)

Sponsors

Femasys Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
21 Years to 45 Years
Healthy volunteers
Yes

Inclusion criteria

* Female, 21 - 45 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 * 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) * Allergy to shellfish, betadine or iodinated contrast

Design outcomes

Primary

MeasureTime frameDescription
Reliance Ratewithin 1 yearNumber of subjects told to rely divided by number of qualified subjects
Concordancewithin 1 yearConcordance between FemBloc confirmation with FemChec and Fluoro HSG confirmation

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026