The primary role of the reproductive system is to facilitate procreation and the continuation of species. In humans, the reproductive system is designed to produce gametes (sperm in males and eggs in females), facilitate fertilization, and support the development of offspring. In females, this system also involves hormonal regulation, menstrual cycles, pregnancy, and childbirth. The male reproductive system includes the production of testosterone and the nurturing of sperm. Additionally, sexual reproduction promotes genetic diversity, which is essential for the adaptability and survival of species in changing environments.