A contraceptive device, comprising at least an insertion tube (111, 511) for providing at least one catheter (104a, 104b); at least one catheter (104a, 104b), comprising an end structure (105a, 105b) on a delivery end thai is adapted to maintain the delivery end in at least one uterine cornua and is adapted to aid in localized delivery of one or more compositions; a handle (110, 510); a material cartridge (101, 201) containing the composition comprising an occlusive material positioned within a receptacle in the handle (110, 510); and a system plunger (112, 312, 612, 712, 812, 912) characterised by further comprising: a lock (120, 320, 620, 720, 820, 920, 1020) that is reversibly coupled to a control rod (354, 654, 754, 854, 954), said system plunger (112, 312, 612, 712, 812, 912) being controlled by said lock (120, 320, 620, 720, 820, 920, 1020), wherein the lock (120, 320, 620, 720, 820, 920, 1020) is movable between a first position and a second position, and, when the lock (120, 320, 620, 720, 820, 920, 1020) is in the first position, the system plunger (112, 312, 612, 712, 812, 912) and the control rod (354, 654, 754, 854, 954) are coupled such that movement of the system plunger (112, 312, 612, 712, 812, 912) moves the control rod (354, 654, 754, 854, 954), thereby extending said end structure (105a, 105b), and when the lock (120, 320, 620, 720,820,920,1020) is in the second position, the system plunger (112, 312, 612, 712,812,912) and the control rod (354,654,754, 854, 954) are uncoupled such that the system plunger (112, 312, 612, 712, 812, 912) can move independently of the control rod (354, 654, 754, 854, 954) and release said occlusive material. at least an insertion tube (111, 511) for providing at least one catheter (104a, 104b); at least one catheter (104a, 104b), comprising an end structure (105a, 105b) on a delivery end thai is adapted to maintain the delivery end in at least one uterine cornua and is adapted to aid in localized delivery of one or more compositions; a handle (110, 510); a material cartridge (101, 201) containing the composition comprising an occlusive material positioned within a receptacle in the handle (110, 510); and a system plunger (112, 312, 612, 712, 812, 912) characterised by further comprising: a lock (120, 320, 620, 720, 820, 920, 1020) that is reversibly coupled to a control rod (354, 654, 754, 854, 954), said system plunger (112, 312, 612, 712, 812, 912) being controlled by said lock (120, 320, 620, 720, 820, 920, 1020), wherein the lock (120, 320, 620, 720, 820, 920, 1020) is movable between a first position and a second position, and, when the lock (120, 320, 620, 720, 820, 920, 1020) is in the first position, the system plunger (112, 312, 612, 712, 812, 912) and the control rod (354, 654, 754, 854, 954) are coupled such that movement of the system plunger (112, 312, 612, 712, 812, 912) moves the control rod (354, 654, 754, 854, 954), thereby extending said end structure (105a, 105b), and when the lock (120, 320, 620, 720,820,920,1020) is in the second position, the system plunger (112, 312, 612, 712,812,912) and the control rod (354,654,754, 854, 954) are uncoupled such that the system plunger (112, 312, 612, 712, 812, 912) can move independently of the control rod (354, 654, 754, 854, 954) and release said occlusive material. a lock (120, 320, 620, 720, 820, 920, 1020) that is reversibly coupled to a control rod (354, 654, 754, 854, 954), said system plunger (112, 312, 612, 712, 812, 912) being controlled by said lock (120, 320, 620, 720, 820, 920, 1020), wherein the lock (120, 320, 620, 720, 820, 920, 1020) is movable between a first position and a second position, and, when the lock (120, 320, 620, 720, 820, 920, 1020) is in the first position, the system plunger (112, 312, 612, 712, 812, 912) and the control rod (354, 654, 754, 854, 954) are coupled such that movement of the system plunger (112, 312, 612, 712, 812, 912) moves the control rod (354, 654, 754, 854, 954), thereby extending said end structure (105a, 105b), and when the lock (120, 320, 620, 720,820,920,1020) is in the second position, the system plunger (112, 312, 612, 712,812,912) and the control rod (354,654,754, 854, 954) are uncoupled such that the system plunger (112, 312, 612, 712, 812, 912) can move independently of the control rod (354, 654, 754, 854, 954) and release said occlusive material.