Whata is sperm

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Skip navigation! Story from Sex. Kathryn Lindsay.

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People have sex for pleasure, reproduction, or both. Pregnancy happens when an egg and sperm successfully meet through intercourse or in vitro fertilization. What do they look like, and how many do we all have?

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Unlike the female genitaliathe male reproductive organs are on both the interior and the exterior of the pelvic cavity. They include:. Sperm production occurs in the testicles.

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Low sperm count means that the fluid semen you ejaculate during an orgasm contains fewer sperm than normal. A low sperm count is also called oligospermia ol-ih-go-SPUR-me-uh. A complete absence of sperm is called azoospermia. Your sperm count is considered lower than normal if you have fewer than 15 million sperm per milliliter of semen.

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Sperm motility refers to how well the sperm in a given semen sample are moving and it is one of the parameters looked at in a semen analysis. Natural conception and pregnancy cannot happen if sperm are unable to move. Not all the sperm have to be able to move, though.

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Reproduction is the process by which organisms make more organisms like themselves. But even though the reproductive system is essential to keeping a species alive, unlike other body systems, it's not essential to keeping an individual alive. In the human reproductive process, two kinds of sex cells, or gametes GAH-meetzare involved.

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Semenalso called seminal fluidfluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female eggs. Semen also contains other liquids, known as seminal plasmawhich help to keep the sperm cells viable. In the sexually mature human male, sperm cells are produced by the testes singular, testis ; they constitute only about 2 to 5 percent of the total semen volume.

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Sperm is the male reproductive cell. In the types of sexual reproduction known as anisogamy and its subtype oogamythere is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. A uniflagellar sperm cell that is motile is referred to as a spermatozoonwhereas a non-motile sperm cell is referred to as a spermatium.

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