Disorders of sex development (DSDs) are defined as congenital conditions in which development of chromosomal, gonadal, or anatomic sex is atypical Mutations in genes that encode transcription factors, ...

Also called the oedipal complex, the Oedipus complex is a term used in the psychosexual stages of development theory by Sigmund Freud. The concept, first proposed by Freud in 1899 and not formally ...

Penis envy is a theory from early psychoanalyst Sigmund Freud. He believed that when female children realize they lack a penis, they feel “castrated” in comparison to males. Freud believed this was a ...

Oral fixation may occur if a person’s needs are not met during a specific stage of childhood development, according to a theory introduced by psychoanalyst Sigmund Freud. Oral fixations include habits ...