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Chpt15_ANS3319BovineAILab_10 - ANS 3319C Reproductive...

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ANS 3319C Reproductive Physiology and Endocrinology Artificial Insemination in Cattle Objectives 1) To provide an overview of the process of artificial insemination (AI) in cattle. 2) To gain an understanding of the proper methods of handling and thawing frozen semen. 3) To provide “hands-on” experience passing an AI pipette through the cervix to the proper site of semen deposition in cattle. What are the advantages and disadvantages of AI? Advantages 1) Allows for widespread use of genetically superior sires that would normally not be available to breeders because they are too expensive to purchase. 2) Allows for faster and increased genetic improvement in cattle allowing for improved herd performance and productivity. The dairy industry’s use of AI is a good example of how it can be used for herd improvement, i.e.) milk production. 3) Allow for the practical use of gender selected semen where high percentage of progeny (> 90%) born are either male or female. 4) Allows for accelerated progeny testing of sires to determine their genetic potential. 5) Allows for control of venereal disease within a herd. 6) Allows for the elimination of dangerous dairy bulls from the farm. 7) Reduces number of bulls needed for natural service. 8) Allows the producer to use larger and heavier bulls on smaller animals without the danger of injury to the females. 9) Progeny derived from the insemination process can be worth more money. 10) Introduction of new genetic material via importation of semen from outside the country. No expensive handling, quarantine, and shipping costs of live animals. 11) Frozen semen can be stored and used long after the donor or sire is dead. It also allows for the use of semen from an injured sire that is unable to breed naturally. 12) Allows for more efficient use of estrous synchronization, the process of breeding cows over a 3 to 7 day period compared to 21 days in unsynchronized animals.
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