LH can be used by male athletes aiming to increase testosterone production, in order to improve the physical performance.6 LH stimulates the production of endogenous steroids without affecting the testosterone/epitestosterone (T/E) ratio, a known biomarker to assess alterations of endogenous steroids profile. Besides, athletes can also use LH in order to normalize the production of endogenous testosterone suppressed during and after prolonged use of synthetic androgens