A pessary (6100, 6500, 6600, 6800, 7000, 7200, 7300, 7400, 7510, 7600, 7700, 7800, 7900, 8000, 8100) comprising: a stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020); and a mushroom-like shape, extending upwardly from the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020), having a set of radially outwardly hinged top members (6130, 7630, 7730, 7830, 8030) and bottom members (6150, 7650, 7750, 7850, 8050), wherein each top member (6130, 7630, 7730, 7830, 8030) is connected to a bottom member (6150, 7650, 7750, 7850, 8050) by a flexible central hinge (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134), wherein the top members (6130, 7630, 7730, 7830, 8030) are connected at the apex (6140, 6540, 6840, 7040, 7640, 7740, 7840) by flexible top hinges (6230, 6580, 7672, 7734, 7834, 7914, 8032, 8132) and the bottom members (6150, 7650, 7750, 7850, 8050) are connected to the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020) by flexible bottom hinges (6240, 6590, 7676, 7736, 7836, 7916, 8036, 8136), wherein, in a compressed orientation the top members (6130, 7630, 7730, 7830, 8030) and the bottom members (6150, 7650, 7750, 7850, 8050) each fold radially inwardly along said central hinge (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134) that causes the apex (6140, 6540, 6840, 7040, 7640, 7740, 7840) to translate axially away from the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020), and in a deployed orientation, the outer perimeter expands radially along the central hinge line as each of the top members (6130, 7630, 7730, 7830, 8030) and the bottom members (6150, 7650, 7750, 7850, 8050) deploy via axial bias, characterized in that at least one of the top hinges (6230, 6580, 7672, 7734, 7834, 7914, 8032, 8132), the bottom hinges (6240, 6590, 7676, 7736, 7836, 7916, 8036, 8136) and the central hinges (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134) are defined by a thinning of material. a stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020); and a mushroom-like shape, extending upwardly from the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020), having a set of radially outwardly hinged top members (6130, 7630, 7730, 7830, 8030) and bottom members (6150, 7650, 7750, 7850, 8050), wherein each top member (6130, 7630, 7730, 7830, 8030) is connected to a bottom member (6150, 7650, 7750, 7850, 8050) by a flexible central hinge (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134), wherein the top members (6130, 7630, 7730, 7830, 8030) are connected at the apex (6140, 6540, 6840, 7040, 7640, 7740, 7840) by flexible top hinges (6230, 6580, 7672, 7734, 7834, 7914, 8032, 8132) and the bottom members (6150, 7650, 7750, 7850, 8050) are connected to the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020) by flexible bottom hinges (6240, 6590, 7676, 7736, 7836, 7916, 8036, 8136), wherein, in a compressed orientation the top members (6130, 7630, 7730, 7830, 8030) and the bottom members (6150, 7650, 7750, 7850, 8050) each fold radially inwardly along said central hinge (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134) that causes the apex (6140, 6540, 6840, 7040, 7640, 7740, 7840) to translate axially away from the stem (6120, 6220, 6520, 6620, 6720, 7220, 7320, 7420, 7620, 7720, 7820, 7926, 8020), and in a deployed orientation, the outer perimeter expands radially along the central hinge line as each of the top members (6130, 7630, 7730, 7830, 8030) and the bottom members (6150, 7650, 7750, 7850, 8050) deploy via axial bias, characterized in that at least one of the top hinges (6230, 6580, 7672, 7734, 7834, 7914, 8032, 8132), the bottom hinges (6240, 6590, 7676, 7736, 7836, 7916, 8036, 8136) and the central hinges (6160, 6560, 7674, 7732, 7832, 7912, 8034, 8134) are defined by a thinning of material.