Pregnancy can occur when a woman's eggs meet a man's sperm, which are both mature or mature. Before both are released and ready for fertilization, the cells of the reproductive system must go through the process of formation and maturation. This process is called spermatogenesis and oogenesis. In medical terms, spermatogenesis is the process of production and development of sperm cells in the testes in men. Meanwhile, the process of producing and developing a woman's egg cell is called oogenesis. These two processes are called gametogenesis. Spermatogenesis Sperm consists of three parts, namely the oval-shaped head, body, and long tail. The head contains genetic material (genes), while the tail is used to move. The average length of sperm from head to tail is 0.05 millimeters. Spermatogenesis begins in the testes. In a small tubular system called the seminiferous tubule, the circular sperm's initial cells develop to look like tadpoles. After that, sperm move to t...