👉 Gynecomazia is a term used in medicine and reproductive health to describe abnormal changes or defects in the male reproductive system. It can refer to a variety of conditions, including: 1. Testicular atrophy (testicular failure): This occurs when there's no growth or development of the testicles, leading to a lack of sperm production. 2. Testicular cancer: When cells in the testicle grow uncontrollably and spread to other parts of the body. 3. Male infertility