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Pilot Bi-Lateral Tubal Occlusion Trial for Female Permanent Contraception

Pilot Bi-Lateral Tubal Occlusion Trial for Female Permanent Contraception

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03067272
Acronym
BLOC
Enrollment
49
Registered
2017-03-01
Start date
2017-03-15
Completion date
2023-03-14
Last updated
2026-09-08

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

Brief summary

Prospective, multi-center, pilot study evaluating the safety of the FemBloc® Permanent Contraceptive System for female sterilization in preventing pregnancy.

Detailed description

Prospective, multi-center, pilot study of subjects undergoing the FemBloc Permanent Contraceptive System procedure conducted at 5 sites in the U.S. following 49 subjects total. The objective of the study was to evaluate the safety of the FemBloc Permanent Contraceptive System for female sterilization in preventing pregnancy. Femasys continued follow-up of pilot subjects for safety a total duration of approximately 68 months after the FemBloc treatment procedure.

Interventions

DEVICEFemBloc® Permanent Contraceptive System

The FemBloc Permanent Contraceptive System consists of treatment with a Delivery System and Blended Polymer, and a confirmation test with the FemChec® Tubal Occlusion Confirmation device as part of a sonographic hysterosalpingogram (Sono HSG).

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 * Agreement to use temporary birth control (excluding IUC) until documented occlusion * Sexually active (minimum of 4 coital acts per month) with male partner who is not known or suspected to be sterile * At low risk for sexually transmitted infection and / or monogamous * Reasonably certain subject is not pregnant at time of screening and procedure visits * Willing to accept the risk of pregnancy while relying solely on FemBloc for contraception * Signs informed consent agreeing to the protocol requirements and is able to meet the trial schedule

Exclusion criteria

* Uncertainty about the desire to end fertility * Suspected or confirmed pregnancy * Prior tubal surgery * Uterine anomaly such as unicornuate, bicornuate, arcuate, septate, and didelphic * Known endometrial or myometrial conditions (e.g. submucous leiomyoma) or uterine position (e.g. retroflexion or anteflexion) that would interfere with insertion tube midline fundal placement, access to uterine cornua, or lateral deployment of the catheters * Any condition which may prohibit proper visualization of the cervix or not allow the uterus to be appropriately instrumented * Active or untreated pelvic infection * Presence or suspicion of gynecologic malignancy * Any condition or medical treatment (e.g. systemic corticosteroids or chemotherapy) that compromises immune system * Post-partum or pregnancy termination \<6 weeks of scheduled procedure * Complicated IUC removal on the day of FemBloc treatment (e.g. use of intracavitary instrument for removal, bleeding, excessive pain) * Scheduled to undergo concomitant intrauterine procedures at the time of FemBloc treatment or planning any uterine procedure within the 3 months after treatment * Known hypersensitivity to cyanoacrylate or formaldehyde * Prior history of ectopic pregnancy * Abnormal uterine bleeding of unknown etiology * Any general health condition or systemic disease that may represent, in the Investigator's opinion, a potential increased risk associated with device use or pregnancy, or that would not allow them to complete the trial

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects Who Experience an Adverse Event Divided by the Number of Subjects Exposed to the FemBloc System (Blended Polymer Treatment and Confirmation Test)3 months (pilot study safety endpoint and then through 5 years)Number of subjects who experience an Adverse Event divided by the number of subjects exposed to the FemBloc System. Evaluated up to 3 months after the FemBloc Treatment and Confirmation Test (device and/or procedure related AEs) and then through 5 years.

Countries

United States

Contacts

STUDY_DIRECTORStudy Director

Sponsor Clinical Affairs

Participant flow

Pre-assignment details

49 subjects enrolled (intent to treat) and 49 subjects had treatment and confirmation test completed; no significant events occurred between enrollment and assignment of participant to group

Baseline characteristics

Characteristic
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
0 Participants
Age, Categorical
Between 18 and 65 years
49 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
14 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
35 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
6 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants
Race (NIH/OMB)
White
41 Participants
Sex: Female, Male
Female
49 Participants
Sex: Female, Male
Male
0 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 49
other
Total, other adverse events
38 / 49
serious
Total, serious adverse events
0 / 49

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 9, 2026