part of part of has part has part has_part characteristic of has modifier testosterone increased circulating testosterone level MPheno.ontology greater than the normal blood concentration of a potent androgen that promotes development of male secondary sex characteristics and the development of spermatozoa and may regulate sexual desire and help maintain bone and muscle health in both males and females MP:0002781 elevated serum levels of testosterone increased serum levels of testosterone abnormal circulating testosterone level increased circulating hormone level abnormal increased amount blood