Testosterone, Serum Free (Mass Concentration)

Why Is This Test Done?

Your healthcare provider may order this test to evaluate symptoms related to hormone imbalances, such as irregular menstrual cycles, low libido, or signs of androgen deficiency. It can also be used in fertility evaluations, monitoring hormone therapy, or diagnosing conditions like polycystic ovary syndrome (PCOS) or hypogonadism.

What Does the Result Mean?

Results are not provided with specific numeric ranges, as they vary by lab and patient factors. Your provider will interpret the result in relation to your overall health and symptoms. High or low free testosterone levels may indicate underlying medical conditions that need further evaluation.

What to Expect Before the Test

No special preparation is typically needed, but you may be asked to fast for 8–12 hours before the test if serum is the specimen. Wear comfortable clothing for a blood draw. Avoid smoking or consuming alcohol for a few hours before the test.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm using a small needle. You may feel a slight pinch, but the procedure usually takes less than five minutes. The blood sample is then sent to a lab for analysis.