Sperm is the small male reproductive cell. It may contain Y chromosomes which lead to the development of a male offspring, or X chromosome which produces female offspring after fertilizing the ovum (egg cell). It takes two and a half months to grow and mature in the testes.
Under the right conditions, sperm can live up to five days inside a woman's body. Healthy sperm requires a cool environment to thrive. Reduced fertility can be caused by factors such as cigarettes smoking, obesity, as well as coffee and alcohol consumption.
Diet also plays a role in determining the quality of sperm produced. Having healthy sperm is important because half of the genetic code of a child is carried within a man's sperm.