An interventional study of FemBloc and Laparoscopic bilateral tubal sterilization in Contraception, sponsored by Femasys Inc.. Completed at 12 sites in United States. Open to female participants aged 21 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-02-27.
Sponsored by Femasys Inc. · Not applicable, Interventional, and Prevention
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.
Femasys Inc. is the lead sponsor of 7 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
For FemBloc Arm:
For Control Arm:
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational device and procedure
Device: FemBloc
Laparoscopic bilateral tubal sterilization
Procedure: Laparoscopic bilateral tubal sterilization
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)
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
Time frame: 1-5 years
Ran from Feb 2018 to primary completion in Jan 2020, 23 months.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
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Femasys Inc.