Browsing by Author "Grieger, D.M."

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Browsing by Author "Grieger, D.M."

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  • Milking twice daily in the presence of a cow’s own calf fails to prolong postpartum anestrus
    Lamb, G.C.; Lynch, J.M.; Miller, B.L.; Grieger, D.M.; Stevenson, J.S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1997)
    Six treatment s were initiated approximately 15 days after calving: 1) calf was weaned permanently from its dam (calf weaned; CW); 2) calf was present continuously with its dam but contact with the udder was prohibited ...
  • 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: ...
  • Optimizing a new 5-day CIDR-CO-Synch timed artificial insemination program
    Stevenson, J.S.; Pulley, S.L.; Mellieon, H.I.; Olson, KC; Jaeger, J.R.; Johnson, S.K.; Grieger, D.M.; Breiner, R.A. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2011)
    The 7-day CO-Synch + CIDR protocol is a popular ovulation-synchronization program used by cow-calf producers to facilitate artificial insemination (AI). A progesterone- impregnated controlled internal drug release (CIDR) ...
  • Puberty induction in young gilts: ovarian, uterine, and pregnancy responses
    Guo, J.; Grieger, D.M.; Davis, D.L. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1997)
    The age of gilts when their first litter is produced affects reproductive efficiency and the applications of biotechnologies such as in vitro fertilization and genetic engineering. Therefore, we evaluated the effect of ...
  • Reproductive performance of replacement heifers implanted as young calves or at weaning
    Grieger, D.M.; Corah, L.R.; Spell, A.R.; Cook, D.L.; Butine, M.D.; Anderson, K. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1997)
    This study evaluated the effect of implanting potential replacement heifers (n=548) with Component E-C® (10 mg of estradiol and 100 mg of progesterone) between 45 and 120 days of age or at weaning (200 days of age) ...
  • Short-term progestin estrus synchronization with timed insemination for beef heifers: CIDR vs. MGA
    Thompson, A.W.; Eborn, D.R.; Keenan, L.D.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2004)
    Recently, a new product, Eazi-Breed CIDR (a vaginal insert containing progesterone), was approved for estrus synchronization in beef heifers. In previous studies the CIDR has produced excellent estrus synchrony, but it ...
  • 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 ...
  • Steroid hormone profiles and brain monoamine oxidase type A (MAO-A) activity of buller steers
    Epp, M.P.; Blasi, D.A.; Johnson, B.J.; Kayser, J.P.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2004)
    A grazing/feedlot field study was conducted to evaluate the steroid hormone profile and brain monoamine oxidase type A (MAOA) activity of steers exhibiting characteristics attributed to the Buller Steer Syndrome in ...
  • Supplemental progestin increases pregnancy rates in suckled beef cows
    Stevenson, J.S.; Lamb, G.C.; Grieger, D.M.; Cartmill, J.A.; Hensley, B.A.; El-Zarkouny, S.E.; Marple, T.J. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2000)
    In two experiments, combining a source of progestin with the ovulation synchronization protocol using gonadotropin-releasing hormone plus prostaglandin F2a (GnRH + PGF2a) tended to increase or statistically increase ...
  • Timed artificial insemination in yearling beef heifers: 7-11 Cosynch VS. Cosynch
    Thompson, A.W.; Holladay, C.D.; Eborn, D.R.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2003)
    Previous research demonstrated that an estrus-synchronization program using a short period of melengestrol acetate (MGA) feeding in conjunction with a Cosynch protocol was effective in synchronizing estrus in postpartum ...
  • Timed-insemination of beef heifers using Cosynch with one or two initial injections of GnRH
    Grieger, D.M.; Holladay, C.D.; Eborn, D.R. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2002)
    Our purpose was to determine if giving an additional injection of GnRH to beef heifers synchronized with the Cosynch protocol would increase pregnancy rate to timed A.I. Eighty yearling beef heifers received an injection ...
  • Timed-insemination of beef heifers using Cosynch with or without MGA
    Grieger, D.M.; Wickersham, T.A.; Cochran, R.C. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    Our purpose was to determine if feeding melengesterol acetate (MGA) for 1 week in combination with gonadotropin-releasing hormone (GnRH) and prostaglandin-F2" (PGF) would better synchronize heifers for timed artificial ...