An apparatus for obtaining controlled male contraception comprises an implantable constriction device for gently constricting (i.e. without substantially hampering the blood circulation in the tissue wall) at least one portion of vas deference to influence the flow in vas deference, and a stimulation device for stimulating the wall portion of the tissue wall. A control device controls the stimulation device to stimulate the wall portion,and/or the constriction device to constrict the wall portion, to cause restriction of the wall portion to influence the flow in vas deference. The apparatus can be used for restricting or stopping the flow in vas deference or for actively assisting with transportation of sperms, with a low risk of injuring the vas deference.
