The "anal stage" is a term used in psychoanalytic theory to describe a stage of development in young children, usually between the ages of 18 months and three years old. However, there are a number of synonyms for this term that might be used in different contexts or by different theories. These synonyms include the "toilet training stage," the "elimination stage," the "soiling stage," and the "autonomy stage." Each of these terms highlights a different aspect of the child's development during this time, whether it is the acquisition of independent control over bodily functions or the increasing sense of self and independence.