Prospective Multi-Center Trial for FemBloc Permanent Birth Control

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.