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Investigation of single, fixed-time artificial insemination in sows and gilts

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Title: Investigation of single, fixed-time artificial insemination in sows and gilts
Author: Rodrigues, Lima Freya
Department: Department of Population Medicine
Program: Population Medicine
Advisor: Friendship, Robert
Abstract: The studies included in this thesis evaluated the use of two single, fixed-time artificial insemination (FTAI) techniques in both sows and gilts. One method involved IM injections of 600 IU of equine chorionic gonadotropin (eCG) followed by 5 mg of porcine luteinizing hormone (pLH) and the other method was a 200 μg intravaginal dose of triptorelin acetate. Time of ovulation was monitored by ultrasound in a subset of animals. Both FTAI techniques resulted in sows farrowing within a short interval, leading to older and heavier pigs at weaning compared to controls. However, FTAI was associated with decreased farrowing rates, smaller litters, and fewer pigs produced per group in certain circumstances. The use of FTAI should be further investigated to determine why reproductive performance is sometimes reduced.
URI: http://hdl.handle.net/10214/12127
Date: 2018-01
Rights: Attribution 2.5 Canada
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Attribution 2.5 Canada Except where otherwise noted, this item's license is described as Attribution 2.5 Canada