Testicles play a crucial role in testosterone production and sperm health, but many men notice changes when starting Testosterone Replacement Therapy (TRT). This category covers how TRT impacts testicular function, why testicle size may shrink, and how treatments like HCG can help maintain natural hormone production. Learn how to support testicular health, fertility, and overall well-being while on TRT. Whether you’re looking to prevent side effects or optimize hormone balance, understanding how testicles function is key to long-term success.