A sliding stone (or rock slide or slide) is a stone of natural origin or megalithic subject to a belief of fertility, according to which to slide on can cure or prevent infertility.
To be proper for its use, a sledge stone is a rock having a sufficient inclination and size: menhir, pillar of dolmen, block of rock, etc. Traditionally, such a stone is used for a rite supposed to cure infertility: to be able to have a child, a woman must slide all the way – often bare buttocks, the skin being in contact with the stone. For a neighboring purpose, other stones have the power to promote marriage in the year. These rocks can be designated in many ways, as in French: slide stone, stone to slip, gemstone, stone to erect, etc.