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Sperm are cells that fertilize a female’s eggs as part of the human reproductive process. They must travel from a male’s testicles, where they’re made, to a female’s fallopian tubes, where eggs... Sperm, male reproductive cell, produced by most animals. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) the ovum (egg) of a female to produce a new offspring. Mature sperm have two distinguishable parts, a head and a tail. Sperm are male sex cells that fertilize female eggs to start pregnancy. Learn about sperm production, structure, health and problems that affect fertility. Sperm cells are found in semen. They come in two types and carry an X or Y chromosome. Here, learn how sperm looks and how many men have.
