Female
pseudohermaphrodites have ovaries, female genital ducts, and masculinized external genitalia.
[2.] Juliame Imperato-McGinley et al., "Steriod 5-alpha Reductase Deficiency in Man: An Inherited Form of Male Pseudohermaphroditism," Science 186 (1974): 1213-15; Juliane Imperato-McGinley et al., "Androgens and the Evolution of Male-Gender Identity among Male
Pseudohermaphrodites with 5-alpha Reductase Deficiency," NEJM 300 (1979): 1235-36.
Goy and Resko (1972) showed that testosterone injections produce both yawning and penile erections in male rhesus monkeys; Phoenix and Chambers (1982) found that testosterone propionate, but not estradiol, produced yawning in females and
pseudohermaphrodites, as well as in males.
The other three sexes, aside from male and female, are the three subgroups of inter-sexed individuals: true hermaphrodites (one testis and one ovary), male
pseudohermaphrodites (some female genitalia, but no ovaries), and female
pseudohermaphrodites (ovaries and some male genitalia, but no testes).
Evolution of Male-Gender Identity Among Male
Pseudohermaphrodites with
Therefore, abnormalities in sex differentiation can occur which may lead to true hermaphrodites,
pseudohermaphrodites and gonadal dysgenesis etc5.