Answer:
Sperm washing is the process in which individual sperms are separated from the semen. Washed sperm is used in artificial insemination using the intrauterine insemination (IUI) technique and in in vitro fertilization (IVF). It may also be used to decrease the risk of HIV transmission by an HIV-positive male, in which case the washed sperm is injected into a female using an artificial insemination technique.
Sperm washing involves removing any mucus and non-motile sperm in the semen to improve the chances of fertilization and to extract certain disease-carrying material in the semen. Sperm washing is a standard procedure in infertility treatment.
Explanation:
Sperm washing takes place in a laboratory following sperm donation.
Sperm may be washed by density gradient centrifugation or by a "direct swim-up" technique that does not involve centrifugation. In normal semen samples, centrifugation causes no more DNA damage to spermatozoa than a direct swim-up technique.[1]
Washed sperm is concentrated in Hams F10 media without L-glutamine, warmed to 37 °C (99 °F).[2] A chemical known as a cryoprotectant is added to the sperm to aid the freezing and thawing process.[3] Further chemicals may be added which separate the most active sperm in the sample, as well as extend or dilute the sample so that vials for a number of inseminations are produced.
D. The consumption of legal and illegal drugs
Freestyle wrestling is a grappling style that is also practiced worldwide. This style of wrestling has links to “catch-as-catch-can” styles of wrestling, which involve using almost any technique to throw down and pin your opponent in order to win. Freestyle wrestling brings together the different traditional wrestling styles of sambo and judo.
The name “Greco-Roman” was used to purport that this style of wrestling is similar to styles used by ancient civilizations around the Mediterranean Sea, especially during the ancient Greek Olympics. Greco-Roman wrestling is practiced worldwide and was first part of the Olympic Games in 1896. It has continued to be part of the summer Olympics since 1908. Greco-Roman and freestyle wrestling have some key similarities but also differences. Both involve grappling with an opponent, takedowns, and turns with the aim of pinning an opponent. The major differences between these two styles of wrestling include the following One of the main differences between these two styles of wrestling is that Greco-Roman forbids any holds below the waist, but freestyle wrestling allows you to use your legs as both defensive and offensive weapons. You can also use a double leg or single leg takedown to pin your opponent to the mat. Because of this major difference, these two wrestling styles use vastly different strategies and techniques.
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