Abstract: A male contraceptive which is effective, reversible and non-surgically implanted, which prevents the transport of sperm by occluding the lumen of the vas deferens, the ejaculatory duct, or the urethra. The male contraceptive is inserted and removed through the urethra. The contraceptive comprises an elongated hollow tube having an expandable elastic cap forming a fluid tight seal at one end and a plug forming a fluid tight seal at the other end. A flexible spring is provided within the tube. The plug includes a valve for allowing the selective ingress and egress of the fluid.