Browsing by Author "Thompson, K.E."

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Browsing by Author "Thompson, K.E."

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  • Fertility after timed breeding using GnRH, PGF2, and norgestomet
    Thompson, K.E.; Stevenson, J.S.; Grieger, D.M.; Lamb, G.C.; Marple, T.J.; Corah, L.R.; Nichols, D.A.; McKee, R.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1997)
    At the KSU Purebred Unit, 164 purebred Angus, Hereford, and Simmental cows were used to test a new estrus-synchronization program using GnRH, PGF2, and norgestomet. Cows were inseminated after detected estrus, or in ...
  • Fixed-time insemination of suckled beef cows. 1. select synch, cosynch, and their combination
    Stevenson, J.S.; Thompson, K.E.; Lamb, G.C.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1999)
    As in our previous studies, the GnRH + PGF2" treatment was very effective in inducing a fertile estrus and(or) ovulation. Ovulations induced in response to the first GnRH injection averaged 48% in three herds and ranged ...
  • Milking two or five times daily in the presence of a cow’s own nonsuckling calf fails to prolong postpartum anovulation
    Lamb, G.C.; Thompson, K.E.; Heldt, J.S.; Löest, C.A.; Stevenson, J.S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1998)
    Three treatments were initiated at approximately 15 days after calving and continued for 4 weeks: 1) cows were suckled ad libitum by their calves (calf present [CP]); 2) calves were present but nonsuckling 24 hr/day and ...
  • A novel estrus-synchronization program for anestrous and cycling, suckled, beef cows
    Forbes, W.L.; Corah, L.R.; Grieger, D.M.; Thompson, K.E.; Lamb, G.C.; Stevenson, J.S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1997)
    We used four herds at three Kansas ranches to evaluate the potential of two new estrus synchronization strategies to increase estrus expression and fertility of 911 crossbred suckled beef cows. The treatments included: ...
  • Site of semen deposition and fertility in lactating beef cows synchronized with GnRH and PGF2a
    Grieger, D.M.; Lamb, G.C.; Rozell, T.G.; Thompson, K.E.; Stevenson, J.S.; Anderson, K. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1998)
    Our objective was to determine the effect of site of semen deposition on pregnancy rate in beef cows inseminated at a fixed time or after observed estrus. Cows were synchronized with a combination of gonadotropin-releasing ...
  • Success of several programed AI-breeding protocols including ovsynch
    Stevenson, J.S.; Thompson, K.E.; Kobayashi, Y. (Kansas Agricultural Experiment Station, 1996)
    In Experiment 1, four programmed AIbreeding treatments were tested. The so-called OvSynch program, which requires no heat detection before a fixed-time insemination, decreased conception rates compared with a similar ...