Clergy is the generic term use to describe the formal religious leadership within a given religion. The term comes from Greek κλήρος - kleros (a lot, that which is assigned by lot (allotment) or metaphorically, heritage). Depending on the religion, clergy usually take care of the ritual aspects of the religious life, teach or otherwise help in spreading the religion's doctrine and practices. They often deal with life-cycle events such as childbirth, baptism, circumcision, coming of age ceremonies, marriage, and death.