All anabolic/androgenic steroids when taken in doses sufficient to promote muscle gain are expected to suppress endogenous testosterone production. Without the intervention of testosterone-stimulating substances, testosterone levels should return to normal within 1-4 months of drug secession. Note that prolonged hypogonadotrophic hypogonadism can develop secondary to steroid abuse, necessitating medical intervention. Primobolan® is generally described as having a low impact on endogenous testosterone production. While this may be true in small clinical doses (20-25 mg daily), this may not be a major distinction when used for physique- or performance-enhancing purposes. In one study, more than half of the patients receiving only 30-45 mg per day noticed a 15-65% suppression of gonadotropin levels. 585 While this is far from having no hormonal impact, the suppression caused by methenolone acetate may still be less pronounced than with many other agents. If Primobolan® is used at moderate doses for less than 8 weeks, hormonal recovery should not be a protracted experience.