The male sex hormone, is a quantitative marker of your body’s current Testosterone level, it is used in the diagnosis and management of Testosterone Deficiency Syndrome. The test should be performed ideally in the morning when your natural physiological levels are highest, and ideally just before your next injection if you are on the depot.
Follicle Stimulating Hormone
A hormone produced by the pituitary gland that is involved in the testes producing sperm and hence, fertility.
A hormone produced by the pituitary gland that stimulates intratesticular production of testosterone.
Low levels have been linked to several signs of poor sexual health, as well psychological health. High levels interfere with the male’s ability to produce testosterone and may be associated with a prolactinoma, a pituitary space occupying lesion.
Oestradiol is a bi-product of the breakdown of Testosterone. It affects male libido and overproduction can cause development of female characteristics.
Full Blood Count
Testosterone stimulates erythropoiesis (i.e. production of red blood cells); this can increase the viscosity of the blood increasing the chances of clotting. A raised haematocrit (>54%) is a contraindication to Testosterone Replacement Therapy, so it is measured 3 months after commencing therapy, then at least annually.
Prostate Specific Antigen
An antigen produced by the prostate gland. Testosterone does not increase Prostate Cancer risk but can increase Lower Urinary Tract Symptoms and worsen existing Prostate Cancer as it is androgen receptor positive. A PSA measurement of >4 is a contraindication to receiving Testosterone Replacement Therapy. It should therefore be measured 3 months after commencing TRT, and then 6 monthly.