Various estrus-synchronization programs for heifers

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dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2011-07-22T13:53:17Z
dc.date.available 2011-07-22T13:53:17Z
dc.date.issued 2011-07-22
dc.identifier.uri http://hdl.handle.net/2097/10738
dc.description.abstract Various programs of estrus synchronization have been tested during the last 6 years to determine the least costly and most efficacious for dairy heifer replacements. Four systems were tested: 1) a modified Ovsynch treatment (GnRH 7 days before PGF2 alpha followed by GnRH either at 24, 30, 33, 40, or 48 hr, with one fixed-time insemination 16 to 20 hr later); 2) a similar protocol that used GnRH 7 days before PGF [subscript]2alpha followed by insemination at estrus (GnRH + PGF [subscript]2alpha); 3) inseminations after one or two injections of PGF [subscript]2alpha given 14 days apart (PGF [subscript]2alpha; heifers not detected in estrus after the second of two PGF [subscript]2alpha injections were given one fixed-time insemination at 72 hr); and 4) two injections of PGF[subscript]2alpha given 14 days apart followed by GnRH at 33 hr, with one fixed-time insemination 16 to 18 hr later (2 x PGF[subscript]2alpha + GnRH). The PGF[subscript]2alpha treatment in which heifers were inseminated after detected estrus following one or two injections of PGF[subscript]2alpha was the least costly for heifers and produced the best measures of fertility. en_US
dc.publisher Kansas Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 1997 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 98-100-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station and Cooperative Extension Service); 792 en_US
dc.subject GnRH en_US
dc.subject PGF2 en_US
dc.subject Estrus synchronization en_US
dc.subject Heifers en_US
dc.subject Dairy en_US
dc.title Various estrus-synchronization programs for heifers en_US
dc.type Conference paper en_US
dc.date.published 1997 en_US
dc.citation.epage 42 en_US
dc.citation.spage 40 en_US
dc.contributor.authoreid jss en_US

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