The vast majority of glucocorticoid activity in most mammals is from cortisol, also known as hydrocortisone. Corticosterone, the major glucocorticoid in rodents, is another glucocorticoid.
Men who test negative for a known breast cancer gene abnormality have the same very low risk of developing breast cancer as men in the general population. Whether you are a woman or a man, testing negative also means that you could not have passed the genetic abnormality on to your children.
A negative test result means that HIV antibodies were not detected in your blood at the time of testing. This does not completely rule out infection. If, in the last 2 months, you have engaged in high risk behavior, there is a possibility that you may still be infected with HIV.