oral stage - focus on the mouth - can lead to fixation of smoking
anal stage - child gains pleasure from withholding/expelling faeces - can lead to anal retentive or anal expulsive personality
phallic stage - focus on genital area - leads to narcissistic personality
latency - all sexual desires are suppressed
genital stage - all sexual desires become conscious
if all stage is successfully completed then adult is sexually matured and mentally healthy