Induction of fertile estrus during lactation in sows

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dc.contributor.author Stevenson, Jeffrey S.
dc.contributor.author Davis, Duane L.
dc.date.accessioned 2010-04-30T17:35:45Z
dc.date.available 2010-04-30T17:35:45Z
dc.date.issued 2010-04-30T17:35:45Z
dc.identifier.uri http://hdl.handle.net/2097/3769
dc.description.abstract Our objective was to determine the effectiveness of inducing estrus during lactation by reducing the nursing load of the sow between 2 and 4 weeks after farrowing. lactating sows were separated from their litters for either 6 (20 sows) or 12 (10 sows) hr/day between 2 and 4 weeks postpartum. For comparison, the litters of other sows were weaned at either 2 (13 sows) or 4 (16 sows) weeks of age. Estrus was induced in 13 of 20 (65%) sows and 5 of 10 (50%) sows that were separated from their litters for 6 or 12 hr/day during lactation, respectively, compared with 0/13 and 0/16 sows weaned at 2 or 4 weeks. The 18 sows that showed estrus during lactation averaged 5.9 days from the first day of litter separation to estrus compared with 4.4 and 4.2 days from weaning to estrus for sows weaned at 2 or 4 weeks. Fertility traits (number of corpora lutea, eggs fertilized, fertilization rate, eggs cleaved, and cleavage rate) were unaffected by treatment. Daily separation of sows from their litters for at. least 6 hr/day resulted in 60% of the sows showing synchronous estrus in 4 to 8 days with fertility similar to that of sows weaned completely at 2 or 4 weeks postpartum. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1983 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 84-174-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 442 en_US
dc.subject Swine en_US
dc.subject Fertile en_US
dc.subject Estrous en_US
dc.subject Lactation en_US
dc.title Induction of fertile estrus during lactation in sows en_US
dc.type Conference paper en_US
dc.date.published 1983 en_US
dc.citation.epage 22 en_US
dc.citation.spage 20 en_US
dc.description.conference Swine Day, Manhattan, KS, November 10, 1983 en_US
dc.contributor.authoreid jss en_US
dc.contributor.authoreid davis en_US


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