Pregnancy rates in virgin heifers and suckled beef cows after synchronized ovulation using PGF2", norgestomet, and GnRH

K-REx Repository

Show simple item record

dc.contributor.author Hoffman, D.P.
dc.contributor.author Krehbiel, C.L.
dc.contributor.author McKee, R.M.
dc.contributor.author Stevenson, Jeffrey S.
dc.contributor.author Nichols, David A.
dc.date.accessioned 2010-09-10T19:52:18Z
dc.date.available 2010-09-10T19:52:18Z
dc.date.issued 2010-09-10T19:52:18Z
dc.identifier.uri http://hdl.handle.net/2097/4881
dc.description.abstract One disadvantage of most estrous synchronization programs is their inability to induce cycling in prepubertal heifers and anestrous suckled beef cows. Suckled cows and virgin heifers were treated with PG F2", norgestomet, and GnRH to induce ovarian cyclicity in prepubertal heifers and anestrous suckled cows as well as to synchronize estrus in cycling females. The treatment consisted of two injections of PGF2" (day –14 and 0) plus 100 μg of GnRH and a 6 mg norgestomet implant on day –7. The implants were removed 24 h after the second injection of PGF2" (day 0). An injection of 100 μg of GnRH was given 30 hours after implant removal. The treatment group was inseminated at estrus or 18 hours after the second injection of GnRH. Pregnancy rate in the treated female s was higher than in the controls that had received PGF injections 14 days 2" apart and were bred at estrus (65.1 vs 48.1%). The treatment also successfully induced a fertile ovulation in previously prepubertal heifers and anestrous cows (treatment vs. control; 67.7 vs 20.0%). We conclude that treating beef cattle with PGF2", norgestomet, and GnRH induced ovarian cyclicity and increased pregnancy rates in prepubertal heifers, anestrus cows, and cycling females. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Cattlemen’s Day, 1995 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 95-357-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 727 en_US
dc.subject Beef en_US
dc.subject Prepubertal status en_US
dc.subject Anestrus en_US
dc.subject Heifer en_US
dc.subject Cow en_US
dc.subject Estrous synchronization en_US
dc.title Pregnancy rates in virgin heifers and suckled beef cows after synchronized ovulation using PGF2", norgestomet, and GnRH en_US
dc.type Conference paper en_US
dc.date.published 1995 en_US
dc.citation.epage 105 en_US
dc.citation.spage 104 en_US
dc.description.conference Cattlemen's Day, 1995, Kansas State University, Manhattan, KS, March 3, 1995 en_US
dc.contributor.authoreid jss en_US
dc.contributor.authoreid dnichols en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search K-REx


Advanced Search

Browse

My Account

Statistics








Center for the

Advancement of Digital

Scholarship

118 Hale Library

Manhattan KS 66506


(785) 532-7444

cads@k-state.edu