Testosterone Levels Test

The testosterone levels test, also known as a testosterone test or serum testosterone test, is a medical procedure used to measure the level of testosterone in the blood.

Purpose

The purpose of the testosterone levels test is to:

• Diagnose low testosterone (hypogonadism) in men
• Evaluate infertility or erectile dysfunction in men
• Monitor testosterone levels in men undergoing hormone replacement therapy
• Diagnose and monitor conditions such as polycystic ovary syndrome (PCOS) in women
• Monitor testosterone levels in individuals with certain medical conditions, such as pituitary gland disorders

Procedure

The testosterone levels test is typically performed by drawing a blood sample from a vein in the arm.

• A healthcare professional will clean the area where the blood sample will be drawn
• A needle will be inserted into the vein, and a small amount of blood will be collected in a tube
• The blood sample will be sent to a laboratory for analysis

Types of Testosterone Tests

There are two main types of testosterone tests:

• Total testosterone test: measures the total amount of testosterone in the blood, including both free and bound testosterone
• Free testosterone test: measures the amount of testosterone that is not bound to proteins in the blood

Interpretation of Results

The results of the testosterone levels test will be compared to a reference range, which varies depending on the laboratory and the individual's age and sex.

• Normal testosterone levels for adult men: 300-1,000 ng/dL
• Normal testosterone levels for adult women: 15-70 ng/dL

Risks and Side Effects

The risks and side effects of the testosterone levels test are minimal, but may include:

• Pain or bruising at the needle site
• Dizziness or lightheadedness
• Infection (rare)

Frequently Asked Questions (FAQs)

What is a testosterone levels test?
A blood test to measure testosterone hormone levels.

Why is a testosterone levels test done?
To diagnose low testosterone, infertility, or hormonal imbalances.

How is the test performed?
A blood sample is taken from a vein in the arm.

Do I need to fast before the test?
Fasting may be required, depending on the laboratory.

What time of day is best for the test?
Typically done in the morning when testosterone levels are highest.

How long does the test take?
The blood draw takes a few minutes.

Are there any risks associated with the test?
Minor risks include bruising, bleeding, or infection at the needle site.

When can I expect the test results?
Results are usually available within a few days to a week.

What do abnormal results indicate?
Low or high testosterone levels may indicate hormonal imbalances or other health issues.

Who interprets the test results?
A healthcare provider or endocrinologist interprets the results.