A testosterone test measures the amount of the male hormone, testosterone, in the blood. Both men and women produce this hormone.

Testosterone is a hormone made by the testicles. It is important for a man’s sex drive, bodily development, and physical appearance.

 

A testosterone levels test measures the amount of the hormone testosterone in a sample of your blood.

Erectile dysfunction (ED) is a common type of male sexual dysfunction. It is when a man has trouble getting or keeping an erection.