Excessive use of testosterone by athletes can stop their body's normal production. By restarting this production, Pregnyl increases the level of male hormones in the body and activates the testicles. This is necessary to maintain the functioning of the testicles and prevent loss of virility during long-term and high-dose steroid use. Too much external steroids can cause the pituitary to send signals to stop normal production in the testicles in order to balance the male hormone in the body. Pregnyl helps offset this effect by rapidly increasing the level of testosterone in the body. Pregnyl can increase androgen levels in men by 400%. This can increase the effectiveness of steroids while protecting the male organ. However, it can also cause estrogen levels to rise naturally. Usage: In light and medium cycles, it is sufficient to inject 5000 IU once after the cycle. In cures containing drugs such as Deca and Tren, it is recommended to apply 5000 IU preferably twice. Injections should be used once and as soon as the water is mixed. Injections can be given intramuscularly or subcutaneously. Side Effects: When used excessively, Pregnyl may cause gynecomastia, water retention, increased libido, mental instability, headache and high blood pressure. Like any medicine, side effects may occur in people sensitive to Pregnyl.