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Free Androgen Index
What is Free Androgen Index?
Free Androgen Index is a test that is done to check the levels of androgen which is the sex hormone. FAI is a ratio that is calculated after the blood test of testosterone. You may need this test if you have abnormal levels of androgens in the blood which are reflected differently in males & females. The symptoms in males includes less muscular strength & mass, development of breasts and in females symptoms includes extra hair on body & irregular menstrual cycle. The abnormal levels of androgens is also a sign of PCOD in females.
Why is FAI done?
This test is required when men and women show certain symptoms. For men these symptoms may include the improper development of the sex organs, weakness, losing interest in sex and development of breasts.
In women, these symptoms can include improper menstrual cycle, prediabetes, obesity and more. This test can confirm whether these traits are caused due to hormonal imbalance.
Interpreting FAI results
For males, the normal testosterone level ranges from 300 to 1,000 ng/dL. Anything below 300 ng/dL is considered hypogonadism. For females, the level of testosterone in the blood can range from 20 to 70 ng/dL.