Fertility rites are religious rituals that reenact, either actually or symbolically, sexual acts and/or reproductive processes: 'sexual intoxication is a typical component of the...rites of the various functional gods who control reproduction, whether of man, beast, cattle, or grains of seed'.
They may alternatively involve the sacrifice of 'a primal animal, which must be sacrificed in the cause of fertility or even creation', while there is evidence that 'prehistoric mother worship in the form of fertility rites is tied to human sacrifice'.
"Fertility rites may occur in calendric cycles, as rites of passage within the life cycle, or as ad hoc rituals....Commonly fertility rituals are embedded within larger-order religions or other social institutions."
As with cave pictures"[which] show animals at the point of mating...[and] served magic fertility rites", such rites are "...a form of sympathetic magic" in which the forces of nature are to be influenced by the example acted out in the ritual. At times, "ceremonies intended to assure the fecundity of the earth or of a group of women...involve some form of phallic worship".
Central to fertility rites in classical Greece was 'Demeter, goddess of fertility...Her rites celebrated the procession of the seasons, the mystery of the plants and the fruits in their annual cycle of coming to be and passing away'. But most 'women's festivals...related in some way to woman's proper function as a fertile being (which allowed her to promote the fertility of crops too, by sympathy)'.
Because of his link to the grape harvest, however, 'it is not surprising to see Dionysus associated with Demeter and Kore in the Eleusinian Mysteries. For he, too, represented one of the great life-bringing forces of the world'.
Ancient Phoenicia saw 'a special sacrifice at the season of the harvest, to reawaken the spirit of the vine'; while the winter fertility rite to restore 'the spirit of the withering vine' included as sacrifice 'cooking a kid in the milk of its mother, a Canaanite custom which Mosaic law condemned and formally forbade'.