Why you might see this term
A laboratory or clinician may use it alongside symptoms and other findings when investigating androgen-related concerns.
What to keep in mind
FAI is not an appropriate substitute for assessing free testosterone in men, and it does not diagnose PCOS by itself.
Sources & further reading
Prepared by ProFertility · Updated 23 October 2026.
Educational information based on the linked sources. This explanation is not an individual diagnosis or a treatment recommendation. A term appearing here does not mean the test is necessary or included in a particular kit.
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