Effects of GNRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season

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dc.contributor.author Calhoun , Andy
dc.contributor.other Angelo State University . Department of Agriculture .
dc.contributor.committeeMember Dickison , Will J .
dc.contributor.committeeMember Salisbury , Micheal
dc.contributor.committeeMember Scott , Cody
dc.contributor.committeeMember Keith , Susan
dc.creator Calhoun , Andy Kyle
dc.date.accessioned 2012 -09 -14T13 :32 :58Z
dc.date.accessioned 2014 -02 -19T21 :57 :04Z
dc.date.available 2012 -09 -14T13 :32 :58Z
dc.date.available 2014 -02 -19T21 :57 :04Z
dc.date.created 2012 -09 -01
dc.date.issued 2012 -08 -10
dc.date.submitted 2012 -09 -14
dc.identifier.uri http : / /hdl .handle .net /2346 .1 /30022
dc.description.abstract The lack of effective , consistent synchronization protocols for ewes is a barrier to the use of artificial insemination in sheep . This study compared the estrus and ovulation percentage and window of synchrony of estrus and ovulation for ewes synchronized with three experimental protocols . The industry’s current standard protocol using PG600 , an 11 d CIDR and PGF2a was compared to two alternative protocols utilizing GnRH , a 7 d CIDR and PGF2a . Forty Suffolk ewes were divided into 5 groups and each group was placed on a different protocol . Blood sampling began 18 h following CIDR removal and samples were collected every 2 h for 19 consecutively collections . Mean serum concentrations of LH differed between groups (P <0 .05 ) from 22 -42 h following CIDR removal . The two protocols using the shorter 7 d progestin regimen and GnRH to control follicular dynamics resulted in higher estrus and ovulation rates and an acceptable window of synchrony . en_US
dc.format.mimetype application /pdf
dc.language.iso en en_US
dc.subject ewes en_US
dc.subject artificial insemination en_US
dc.subject estrus en_US
dc.subject ovulation en_US
dc.subject GnRH en_US
dc.subject CIDR en_US
dc.subject PGF2a en_US
dc.subject Suffolk ewes en_US
dc.title Effects of GNRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season en_US
dc.type Thesis en_US
dc.type.genre Thesis
dc.type.material text
thesis.degree.name Masters of Science
thesis.degree.level Masters
thesis.degree.discipline Animal Science
thesis.degree.grantor Angelo State University
thesis.degree.department Department of Agriculture

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Calhoun, Andy Effects of GNRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season. Master's thesis, Angelo State University. Available electronically from http : / /hdl .handle .net /2346 .1 /30022 .

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