In the practice of criminal and civil cases - in a divorce settlement, the claims on alimony, in conditions of military service, in issuing identity documents, during the investigation of sexual offences may be necessary to establish a true sex testify person.
In the embryonic period may develop different anatomical malformations of the external genital organs (Bamyan vagina, fusion large and small lips, fusion of a penis with scrotum, cleft scrotum, cryptorchidism, epispadias, hypospadias); only rarely external genitals are missing. In these cases, the question of belonging to a specific gender is due to the fact that the structure of the external genital organs are not fully corresponds neither male nor female.
Under the hermaphroditism (or duprost) understand the condition in which the subject are part of the sexual system, characteristic of both sexes. As crucial in sexual differentiation belongs to hormones sexual glands, persons who have cancer, operating with signs of oogenesis and spermatogenesis, refer to the true hermaphrodites.
This condition is seen in organisms at low levels of development (invertebrates). In humans due to malformations along with the glands of the same sex can be found parts sexual apparatus other sex, i.e. false hermaphroditism. The so-called false female hermaphrodites along with the ovaries (which can function) include external genitals, developed but a male. False men hermaphrodites in the presence of the testicles have external genital parts, developed female type (Fig. 90). Thus, the false hermaphrodites in the presence of functioning of the sex glands of one particular gender the outer parts of the sexual apparatus may have structural characteristics of the opposite sex.
The perception of belonging to a particular gender expressed only when given a set of indicators and anamnestic (menstruation or emission, the nature of sexual attraction and others) and anthropometric data, status of secondary sexual characteristics (overall appearance, tone of voice, hair growth on the face, trunk, genitals, breast development and others), the structure of the external genital organs and functioning of the internal genital glands.
Crucial in determining the sex of the subject is the study of the sex glands and the volume of their functional activity. For this purpose use generally accepted in clinical practice, research methods, including, if necessary, and the study of the function of sexual glands. A certain role in solving the problem belongs to information about treatment witness the faces of endocrinologists, obstetricians-gynecologists, urologists, psychiatrists. Genetic sex determination by laboratory tests of blood (leukocytes) by identifying chromosomal specific gender.