Understanding Testosterone Free
What is Testosterone Free?
This test measures the amount of free testosterone in your blood. Testosterone is the main sex hormone in males. It controls sex drive, maintains muscle mass, and helps in the production of sperm. Women also have testosterone in their bodies, but in much smaller amounts.
A testosterone test may be used to diagnose conditions such as decreased sex drive, infertility, erectile dysfunction in men, and irregular menstrual periods in women.
The levels are highest during early morning and lowest in the evening. Low testosterone levels can also lead to low sperm count, low sex drive, and hair loss. Men who are diagnosed with low testosterone levels may benefit from testosterone supplements.
What is Testosterone Free used for?
To detect an abnormal testosterone level in males and females
To diagnose the cause of infertility in males and females
To diagnose the cause of erectile dysfunction in males
To detect the cause of virilization (masculine physical features) in females
To find out the cause for PCOS (polycystic ovary syndrome)
To determine the cause of ambiguous genitalia (genitals that are not clearly male or female) in children
To diagnose the cause of delayed or early puberty
Interpreting Testosterone Free results
In males: 8.69 - 54.69 pg/mL
In females ( > 12 years)
Follicular phase: 0.45 - 3.17 pg/mL
Luteal phase: 0.46 - 2.48 pg/mL
Oral contraceptive: 0.55 - 2.01 pg/mL
Post menopausal: 0.29 - 1.73 pg/mL
Reference range may vary from lab to lab*