Intra-uterine contraceptive device

Claim 1

An intra-uterine contraceptive device comprising a hollow body made from a biologically inert resilient material, said body including a plurality of adjacent free and hollow arm means adapted to expand when said contraceptive device is inflated by means of a fluid within the uterus, said arm means having free end portions rounded-off for coming into direct contact with the inner walls of the uterus when in the extended position preventing the expelling of the contraceptive device through the cervix due to expelling forces exerted thereon by the uterus, wherein said plurality of arm means extend from said body in a christmas-tree-like fashion laterally and retrogressively when said contraceptive device is inflated, said adjacent arm means leaving sufficient space when extended with the adjacent arm means for allowing the unimpeded passage of the menstrual flow therebetween, said body including a portion containing self-sealing valve means for the injection of said fluid into said contraceptive body and said valve means being adapted to tightly reseal itself after the injection.