The invention concerns an occlusion system that can be implanted in the human or animal body to occlude a natural conduit (10) of the human or animal body, comprising: - an occlusion element (9) intended to surround a part of the natural conduit (10) to be occluded, - an actuating device (2) for actuating said occlusion element (10) to vary the compression exerted by said occlusion element (9) on said conduit (10), - a control unit (7) designed to bias the actuating device (2) in such a way as to exert a predetermined compression on the conduit (10), and - a device for detecting atrophy of said natural conduit (10), comprising: (i) a sensor designed to measure the compression exerted by the occlusion element (9) on the natural conduit (10), and (ii) a processing unit designed to: • determine a parameter representative of a bias to be applied to the actuating device (2) in order to obtain a predetermined compression of the conduit (10) by the occlusion element (9), • monitor said parameter over time, and • detect an atrophy of the natural conduit (10) when said representative parameter fulfils a predefined criterion.
