AI is used for pets, livestock, endangered species, and animals in zoos or marine parks difficult to transport. Reasons and techniques edit It may be used for many reasons, including to allow a male to inseminate a much larger number of females, to allow the use of genetic material from males separated by distance or time, to overcome physical breeding difficulties, to control the paternity of offspring, to synchronize births, to avoid injury incurred during natural mating, and to avoid the need to keep a male at all (such as for small numbers of females or in species whose fertile males may be difficult to manage). Semen is collected, extended, then cooled or frozen. It can be used on-site or shipped to the female's location. If frozen, the small plastic tube holding the semen is referred to as a straw . To allow the sperm to remain viable during the time before and after it is frozen, the semen is mixed with a solution containing glycerol or other cryoprotectants. An extender is...
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