Trans cervical prevention before directions to the fallopian tube closure

摘要

The invention provides intra-fallopian devices and non-surgical methods for their placement to prevent conception. The efficacy of the device (10) is enhanced by forming the structure at least in part from copper or a copper alloy. The device (10) is anchored within the fallopian tube by imposing a secondary shape on a resilient structure, the secondary shape having a larger cross section than the fallopian tube. The resilient structure is restrained in a straight configuration and trans-cervical inserted within the fallopian tube, where it is released. The resilient structure is then restrained by the walls of the fallopian tube, imposing anchoring forces as it tries to resume the secondary shape.