| dc.contributor |
Angelo State University |
|
| dc.creator |
Calhoun , Andy |
|
| dc.date |
2012 -09 -14T13 :32 :58Z |
|
| dc.date |
2012 -09 -14T13 :32 :58Z |
|
| dc.date |
2012 -09 -01 |
|
| dc.date |
2012 -08 -10 |
|
| dc.date |
2012 -09 -14 |
|
| dc.date.accessioned |
2012 -11 -20T16 :37 :47Z |
|
| dc.date.available |
2012 -11 -20T16 :37 :47Z |
|
| dc.date.issued |
2012 -11 -20 |
|
| dc.identifier |
http : / /hdl .handle .net /2346 .1 /30022 |
|
| dc.identifier.uri |
http : / /hdl .handle .net /2346 .1 /30022 |
|
| dc.description |
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 . |
|
| dc.format |
application /pdf |
|
| dc.language |
en |
|
| dc.subject |
ewes |
|
| dc.subject |
artifical insemination |
|
| dc.subject |
estrus |
|
| dc.subject |
ovulation |
|
| dc.subject |
GnRH |
|
| dc.subject |
CIDR |
|
| dc.subject |
PGF2a |
|
| dc.subject |
Suffolk ewes |
|
| 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 |
|
| dc.type |
Thesis |
|
| dc.type |
text |
|
| dc.type |
Thesis |
|