scholarly journals 386 Efficacy of a Second Injection of Prostaglandin F2α in Yearling Beef Heifers Following Previous Estrus Synchronization.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 207-208
Author(s):  
M Erickson ◽  
K C Ramsay ◽  
R N Funston
Keyword(s):  
Prostaglandin F2α ◽  
Estrus Synchronization ◽  
Beef Heifers

THE USE OF PROSTAGLANDIN F2α IN NATURALLY BRED BEEF HEIFERS

1988 ◽  
Vol 68 (4) ◽  
pp. 1301-1304 ◽  
Author(s):  
R. D. H. COHEN ◽  
B. D. KING ◽  
E. D. JANZEN
Keyword(s):  
Key Words ◽  
Prostaglandin F2α ◽  
Estrus Synchronization ◽  
Beef Heifers ◽  
Conception Rates ◽  
Prostaglandin F ◽  
Natural Breeding

Heifers injected with prostaglandin F2α had significantly higher pregnancy and conception rates within 11 d of start of breeding than noninjected heifers; 56.9 vs. 45.5 pregnancy as a percent of heifers exposed (P < 0.05) and 74.1 vs. 58.2 conception as a percent of pregnant heifers (P < 0.005). Data were pooled for 422 heifers over 5 yr. However, there were no significant effects on calving distribution or weaning weights of their calves. Key words: Prostaglandin F2α, natural breeding, heifer, estrus synchronization

Comparison of Melengestrol Acetate-Prostaglandin F2α to Syncro-Mate B for estrus synchronization in beef heifers

1988 ◽  
Vol 30 (1) ◽  
pp. 1-12 ◽  
Author(s):  
L.N. Brown ◽  
K.G. Odde ◽  
M.E. King ◽  
D.G. LeFever ◽  
C.J. Neubauer
Keyword(s):  
Prostaglandin F2α ◽  
Estrus Synchronization ◽  
Beef Heifers ◽  
Melengestrol Acetate

Estrus synchronization systems involving prostaglandin F2α and progesterone pretreatment in beef heifers

1986 ◽  
Vol 25 (2) ◽  
pp. 249-261 ◽  
Author(s):  
C.K. Higgins ◽  
J.G. Berardinelli ◽  
D.K. Han ◽  
R.P. Ansotegui ◽  
E.L. Moody
Keyword(s):  
Prostaglandin F2α ◽  
Estrus Synchronization ◽  
Beef Heifers

scholarly journals Estrus synchronization of replacement beef heifers by using GnRH, prostaglandin F2α (PGF), and progesterone (CIDR): a multi-location study

2004 ◽  
pp. 3-6
Author(s):  
J.E. Larson ◽  
G.C. Lamb ◽  
T.W. Geary ◽  
Jeffrey S. Stevenson ◽  
Sandra K. Johnson ◽  
...  
Keyword(s):  
Prostaglandin F2α ◽  
Estrus Synchronization ◽  
Beef Heifers ◽  
Location Study

Estrus synchronization in beef heifers with progestin-based protocols

2004 ◽  
Vol 62 (8) ◽  
pp. 1518-1528 ◽  
Author(s):  
S.L. Wood-Follis ◽  
F.N. Kojima ◽  
M.C. Lucy ◽  
M.F. Smith ◽  
D.J. Patterson
Keyword(s):  
Estrus Synchronization ◽  
Beef Heifers

158 Effects of an AI plastic sheath with three semen outputs on AI pregnancy rates of beef heifers enrolled in estrus synchronization protocols

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 77-78
Author(s):  
C. L. Timlin ◽  
N. W. Dias ◽  
J. F. Currin ◽  
S. Clark ◽  
V. R. G. Mercadante
Keyword(s):  
Pregnancy Rates ◽  
Estrus Synchronization ◽  
Beef Heifers

scholarly journals COMPARISON OF LONG-TERM PROGESTERONE-BASED PROTOCOL ON REPRODUCTIVE PERFORMANCE OF PREPUBERTAL AND PUBERTAL BEEF HEIFERS.

2014 ◽  
Vol 19 (1) ◽  
Author(s):  
Emanoel Faleiros Silveira ◽  
Luiz Ernandes Kozicki ◽  
Marcio Saporski Segui ◽  
Romildo Romualdo Weiss ◽  
Ivo Walter Santos ◽  
...  
Keyword(s):  
Ultrasound Examination ◽  
Prostaglandin F2α ◽  
Estradiol Benzoate ◽  
Pregnancy Rates ◽  
Estrus Synchronization ◽  
Device Removal ◽  
Timed Artificial Insemination ◽  
Red Angus ◽  
Natural Service

The aim of this study was to investigate estrus synchronization in prepubertal and pubertal heifers (crossbred ½ Nelore x Red Angus - commercial herd) submitted to a long-term progesterone-based protocol for timed artificial insemination (TAI), as well as overall pregnancy rates. Four hundred forty-seven heifers underwent ultrasound examination of the ovaries and were assigned to one of 3 groups: (1) prepubertal heifers (PPNS; n = 114) with ovarian follicles <8 mm in diameter and no corpus luteum (CL) that were submitted to natural service (NS) by bulls for 10 days; (2) prepubertal heifers (PPTAI; n = 124) with follicles <8 mm in diameter and no CL that underwent estrus synchronization with injection of 4.0 mg estradiol benzoate (EB) and insertion of a controlled-release intravaginal progesterone (P4) device containing 0.558 g P4 on d 0, followed by P4 device removal and injection of 150 mg prostaglandin F2α and 0.6 mg estradiol cypionate (ECP) on d 8, and TAI on d 10; and (3) pubertal heifers (PTAI; n = 209) with follicles >8 mm in diameter and/or a CL that underwent the same protocol as PPTAI heifers. Overall pregnancy rate was determined by transrectal ultrasonography on d 45 after NS or TAI. Data were analyzed using the FREQ procedure of SAS (SAS Inst. Inc., Cary, NC). Pregnancy rates were as follows: 20.1% in PPNS, 37.0% in PPTAI, and 48.5% in PTAI (P < 0.05). In conclusion, TAI after estrus synchronization with a hormonal protocol using EB and ECP in prepubertal and pubertal heifers resulted in higher pregnancy rates than prepubertal heifers exposed to natural service, and exposure of prepubertal heifers to a long-term progesterone-based protocol effectively synchronized estrus.

Evaluation of split-time artificial insemination following administration of a long or short-term progestin-based estrus synchronization protocol in beef heifers

2019 ◽  
Vol 133 ◽  
pp. 179-186 ◽  
Author(s):  
E.R. Knickmeyer ◽  
J.M. Thomas ◽  
J.W.C. Locke ◽  
R.C. Bonacker ◽  
M.R. Ellersieck ◽  
...  
Keyword(s):  
Artificial Insemination ◽  
Estrus Synchronization ◽  
Beef Heifers ◽  
Short Term ◽  
Split Time ◽  
Synchronization Protocol
Sign in / Sign up

Export Citation Format

Share Document