Are you interested in

permanent birth control
without surgery?


See if the FemBloc Study is right for you.

About the FemBloc Study

If you do not wish to become pregnant now or in the future, permanent birth control may be right for you. Currently, the most common method for permanent birth control is a surgical procedure called tubal ligation (getting your “tubes tied”). Although effective, tubal ligation involves general anesthesia, skin incisions, and recovery from surgery.

Right now, doctors at select women’s health centers are conducting a research study for FemBloc – an investigational, in-office permanent birth control that does not involve surgery, incisions or implants. Participants in the FemBloc Study will receive the FemBloc procedures followed by a confirmation test and all study-related care at no cost.

What is FemBloc?

The FemBloc permanent birth control is designed to prevent pregnancy without surgery, incisions or implants. This study is being conducted to see how well FemBloc works to prevent pregnancy and how safe it is.

Two FemBloc Investigational Treatments:
A small amount of liquid material is delivered into your uterus through a thin plastic tube on two separate visits, to close a small section of each fallopian tube.

Confirmation Test:
About 3 months after your second FemBloc Treatment, your doctor will perform an ultrasound exam in the office to confirm that your fallopian tubes are closed. After the results of this test, you may be told to use FemBloc as your permanent birth control.

Frequently Asked Questions

FemBloc followed by a confirmation test are performed in the doctor's office, and do not involve surgery, incisions or implants. A specialized liquid called biopolymer is delivered into your uterus through a thin plastic tube in two separate visits, to close a small section of each fallopian tube. About 3 months after your second FemBloc Treatment, your doctor will perform an ultrasound test to confirm that your fallopian tubes are closed to prevent pregnancy.

You may be eligible for this study if:

  • You are female and between the ages of 21-50.
  • You are certain you do not want to get pregnant now or in the future.
  • You are having sex with a male partner who is not sterile.

You cannot join this study if:

  • You are or may be pregnant.
  • You have had surgery of your fallopian tubes.
  • You have had an ectopic pregnancy (when pregnancy grows outside your uterus).
  • You have had an endometrial ablation.
  • You have gynecologic cancer.
  • You have a compromised immune system.
If you join the study, you will receive the FemBloc Treatment investigational procedures followed by confirmation test and study-related care at no cost to you.
Following your confirmation test, you will be contacted by telephone 3 months later to check on how you are doing. Your study doctor’s office will continue to check in with you regularly - by telephone at 1 year, and then at 2, 3, 4, and 5 years after you are told to rely on FemBloc as your birth control (if you prefer, you may visit your study doctor’s office or request a televisit for any of these check-ins). You will be compensated for your time to participate in these visits and check-ins.
Yes, you will continue to see your regular gynecologist for your standard check ups.
As with all clinical studies, your participation is completely voluntary and you may choose to leave the study at any time.
The study is being sponsored by Femasys Inc. (www.femasys.com), a medical device company based in the U.S.
To see if you might qualify for the FemBloc research study, and to get connected with a women’s health specialist conducting the study in your area, the next step is taking the questionnaire. Please click here to get started.

See If You Qualify


To see if you might qualify for the FemBloc research study, and to get connected with a women’s health specialist conducting the study in your area, please take the questionnaire below.