Electra complex of "Mother" develops the super-ego as the girl establishes a discrete sexual identity (ego). Without a penis, the girl cannot sexually possess her mother, as the infantile id demands. Consequently, the girl redirects her desire for sexual union upon her father, and thus progresses to heterosexual femininity, which culminates in bearing a child who replaces the absent penis. Moreover, after the phallic stage, the girl’s psychosexual development includes transferring her primary erogenous zone from the infantile clitoris to the adult vagina. Freud thus considered the feminine Oedipus attitude ("Electra complex") to be more emotionally intense than the Oedipal conflict of
Penis envy by removing the man from the penis or the penis from the man). Freud's theories regarding psychosexual development, and in particular the "phallic stage", were early challenged by other psychoanalysts, such as Karen Horney, Otto Fenichel and Ernest Jones, though Freud did not accept their view of penis envy as a secondary, rather than a primary, female reaction. Later psychologists, such as Erik Erikson and Jean Piaget, challenged the Freudian model of child psychological development as a whole. Jacques Lacan, however, took up and developed Freud's theory of the importance of what he called ""penisneid" in the unconscious of women"