Freud believed that humans progress through 'psychosexual stages', during the development of the psyche. He named five stages, each with a particular characteristic behaviour: oral behaviour (0-18 months); anal – holding or discarding faeces (18 months – 3.5 years); phallic – fixation on genitals (3.5 – 6 years); latency – repressed sexual urges (6 years - puberty); and genital – awakened sexual urges (puberty onwards). Freud claimed that, during development, a child could become fixated on one of these stages, which could lead to specific psychological disorders.