title: The endocrine function of the human testis in regard to sexuality.
abstract: It is well known that the testes play a determining role in male sexuality. However, the exact interrelations between endocrine testicular function and sexual behaviour are not well understood. If these interrelations are to be investigated a number of factors influencing testicular function have to be considered: circadian and seasonal variations, age-related changes, body constitution, physical activity and drug interactions, as well as the influence of endocrine and non-endocrine diseases. The paper emphasizes the complexity of the field and warns against seeing correlations between single random plasma sex hormone determinations and sexual behaviour.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000728:Androgens / Q000378:metabolism; D002940:Circadian Rhythm; D007172:Erectile Dysfunction; D004958:Estradiol / Q000378:metabolism; D006801:Humans; D006908:Hydroxyprogesterones / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010507:Periodicity; D005082:Physical Exertion; D012621:Seasons; D012725:Sexual Behavior; D013737:Testis / Q000502:physiology* / Q000503:physiopathology
chemical_list: D000728:Androgens; D006908:Hydroxyprogesterones; D004958:Estradiol