A vaginal pessary (2400) sized and shaped for alleviating organ prolapse, comprising:(a) a body including a plurality of arc sections (2402, 2404, 2406, 2408) adapted to, at least in one state, extend along a vaginal axis and apply force to facing vaginal walls along axial extents thereof, wherein said body is adapted to be in at least two states:(i) a compressed state in which said body is sized for insertion into said vagina and(ii) an expanded state in which said body is sized and stiff enough for providing organ prolapse alleviation and in which state said plurality of arc sections (2402, 2404, 2406, 2408) extend along a vaginal axis and apply force to facing vaginal walls and (b) a state changing mechanism (2416) integral to said pessary and configured to change a configuration of said body from one state to the other state, wherein said pessary is stable in both states.
