Trenbolone Enanthate cycle severely suppresses the body's natural production of testosterone, which is crucial for sperm production and overall fertility. This can affect your fertility during use and for some time afterward. Recovery time can vary greatly from person to person, and in some cases, there is a risk of more persistent fertility problems. Research has also been conducted on Australian men, highlighting side effects such as aggression, violent behavior, and impulse control issues, as well as the impact trenbolone can have on mental health and relationships.