Description
Testosterone is the primary male sex hormone and anabolic steroid. This testosterone blood test measures the total amount of testosterone that is bound to proteins in the blood as well as testosterone that is not bound (free testosterone). For men, this test evaluates testicular function where obesity, liver or thyroid disorders may change the testosterone binding proteins. In male , testosterone have a key role in the development of male reproductive tissues like prostate and testes , as well as promoting secondary sexual habits.
Test Includes:
Testosterone, Total, Males (Adult), Immunoassay
Albumin
Sex Hormone Binding Globulin (SHBG)
Testosterone, Free and Bioavailable (calculated)
Patient Preparation
Testosterone, Total, Males (Adult), Immunoassay: Due to changes in testosterone levels throughout the day, two morning (8:00-10:00 a.m.) specimens obtained on different days are recommended by The Endocrine Society for screening.
Reference Range(s)
Testosterone, Total, Males (Adult), Immunoassay
Male 250-827 ng/dL
Female Not applicableAll test requests for Testosterone on female and pediatric (18 years) patients must use test code 15983 - Testosterone, Total, MS.
Albumin 3.6-5.1 g/dL
Sex Hormone Binding Globulin
Age Male (nmol/L) Female (nmol/L)
3 Years Not established Not established
3-9 Years 32-158 32-158
10-13 Years 20-166 24-120
14-17 Years 20-87 12-150
18-55 Years 10-50 17-124
55 Years 22-77 14-73
Free Testosterone
Age Male (pg/mL) Female
18-69 Years 46.0-224.0 Not applicable
69 Years 6.0-73.0 Not applicableBioavailable Testosterone
Age Male (ng/dL) Female
18-69 Years 110.0-575.0 Not applicable
69 Years 15.0-150.0 Not applicable
