Free Androgen Index (FAI) Test

Also known as: FAI (Free Androgen Index), Serum

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Sample Type

Blood

Recommended for

Male, Female

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Within 24 Hours

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Free Androgen Index FAI Serum Test Overview

Testosterone is a hormone synthesized by both males and females. It is responsible for organ development and various sexual functions. Sex Hormone Binding globulin [SHBG] is protein that attaches to the sex hormones and controls their utilization in the body. A free androgen index (FAI) is a ratio of testosterone to SHBG [Sex Hormone Binding Globulin] which helps in identifying excessive androgen activity in the body.

CREATED BY : Dr.Shibani R Medical Writer, Medical Affairs

Reasons for Undergoing the Free Androgen Index

The Free Androgen Index (FAI) test is a crucial diagnostic tool for assessing hormonal imbalances and related conditions. There are several reasons why one might undergo this test:

To diagnose hyperandrogenism, which can manifest as symptoms like hirsutism, acne, and male pattern baldness in women
To identify Polycystic Ovary Syndrome (PCOS), a common endocrine disorder characterised by irregular menstrual cycles, infertility, and excess androgen levels
To diagnose other androgenic disorders, such as congenital adrenal hyperplasia, androgen-secreting tumours, or Cushing syndrome
To assess the bioavailability of testosterone in the body, which is essential for understanding various metabolic and reproductive health issues

List of Parameters Considered During the Free Androgen Index

The Free Androgen Index test measures two key parameters to provide insights into hormonal balance:

Total Testosterone: This measures the total amount of testosterone in the blood, including both bound and free fractions. High levels may indicate hyperandrogenism, while low levels could suggest hypogonadism or other hormonal imbalances.
Sex Hormone-Binding Globulin (SHBG): SHBG is a protein that binds to sex hormones, including testosterone, making them biologically inactive. SHBG levels affect the bioavailability of testosterone; lower SHBG leads to higher free testosterone, and vice versa.

The FAI is calculated using the formula: FAI = 100 × (Total Testosterone/SHBG), providing an estimate of the biologically active (free) testosterone in the blood.

Home Collection for Free Androgen Index Near You

Metropolis Healthcare offers a convenient home sample collection option for taking the Free Androgen Index Test, ensuring comfort, safety, and accuracy. A trained phlebotomist will visit your doorstep to collect the blood sample, maintaining higher standards of sample handling without compromising testing precision.

You can expect timely and reliable results, as Metropolis Healthcare is committed to making quality diagnostic solutions accessible from the comfort of your home.

FAI (Free Androgen Index), Serum Price

Metropolis Healthcare is a leading diagnostics centre and pathology lab in India equipped with the latest state-of-the-art technologies that provides the FAI (Free Androgen Index), Serum with a clear pricing structure.

The FAI (Free Androgen Index), Serum Price in Mumbai is ₹ 3,410 .

We are committed to deliver accurate and quality results from the best labs in India with complete transparency regarding test cost and turnaround time. No matter where you are, we strive to offer patients high-quality service that is affordable and accessible.

Frequently Asked Questions

Why is Free Androgen Index FAI Serum Test test done?

FAI is used to identify excessive androgen activity and thus useful in the evaluation of mild disorders of androgen metabolism. It is also used to diagnose other hormonal disorders.

What does it measure?

The test measures the ratio of testosterone to SHBG in the blood.

What to expect during the test?

This test requires a blood sample. A tourniquet (elastic) band is placed tightly on the upper arm. The patient is then asked to make a fist. This helps in the build-up of blood filling the veins. The skin is disinfected before needle insertion and the blood sample is collected in vacutainer.

What if results are Present/ Absent?

A high free androgen index value indicates that there is too much biologically active testosterone in the blood. This may indicate hormonal imbalance. Low-free androgen index indicates testosterone deficiency. Results should be further evaluated in consultation with the treating clinician.

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We offer a comprehensive range of 4000+ clinical laboratory tests and profiles, which are used for prediction, early detection, diagnostic screening, confirmation and/or monitoring of the disease.