The phallic stage is a key concept in Sigmund Freud's psychoanalytic theory. It refers to the developmental stage in which children experience a heightened interest in their genitalia and experience a range of unconscious feelings and conflicts related to their sexuality. While the term "phallic stage" is the most commonly used, there are a number of synonyms that can be used to describe this developmental phase, including the genital stage, oedipal phase, and psychosexual stage. Each of these terms emphasizes different aspects of the child's developmental experiences, but they all refer to the same essential phase of psychosexual development.