SHBG and polycystic ovary syndrome: Biochemical examination of serum androgens including total testosterone, free testosterone, SHBG, androstenedione, 17-hydroxy progesterone (17-OHP) and dehydroepiandrosterone sulfate and assessing the free androgen index (FAI = (total testosterone / SHBG) × 100) is one of the ways for diagnosis of PCOS in women (1).