Free testosterone is the unbound part of testosterone that actually exerts its effects in the body. Total testosterone includes both free and bound fractions.

Low levels of testosteron in men can lead to low sperm count. High levels of testosterone in women can interfere with normal egg maturation.The test is important to diagnose infertility in couples who cannot conceive.

Testing for testosterone levels is usually advised in couples who are unable to conceive, or women with PCOS(Polycystic Ovarian Syndrome). In women, this test may help if symptoms include :Acne: Acne, on the arms or face or back, is usually the first sign of higher than normal testosterone levels.Irregular periods: Irregular cycles or missed periods, are a common complaint and may be caused by abnormal hormone levelsFacial Hair Growth: Excessive facial hair, above the lips or over the chin may be seen in hormonal imbalancesRapid Weight Gain: Sudden increase in weight, or fluctuations in weight are another sign of hormonal imabalanceFailure to conceive naturally: Infertility, after trying for more than a year, is another sign of hormonal disturbances, which need to be investigated.In men the following symptoms indicate need for hormonal tests : Low Sperm Count: A low sperm count may be seen due to low levels or high levels of fertility hormonesDecreased Libido: Lower than normal sex drive may be due to hormonal imbalanceGynecomastia: Men with larger than normal breasts, or nipples should get tested for hormonal imbalance

This is a simple blood test and requires no special preparation. You do not need to be fasting for this test.To perform this test, a sample of blood will be drawn from your vein, by inserting a sterile needle. The blood sample will then be analyzed in the lab.

Testosterone test should be done by the following groups of people: Women with PCOD : Women who are suspected of having PCOD (Polycystic Ovrian Syndrome) should do this test.Couples with Infertility - Couples who cannot conceive can do this testProfessional Body builders & Power Lifters - Professional body builders may monitor their exogenous supplement intake based on testosterone levels