Browsing by Author "Grieger, D.M."

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Browsing by Author "Grieger, D.M."

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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 ...
  • GnRH removal in the 7-11 CO-Synch for timed insemination of beef heifers
    Eborn, D.R.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2007)
    The use of artificial insemination can improve genetics, shorten the calving season, and increase weaning weights by having more calves born earlier in the breeding season. Reasons that this technology has not been used ...
  • Heifer synchronization using 7-11 synch or 7-11 synch + CIDR
    Eborn, D.R.; Spiker, C.R.; Sullivan, R.R.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2009)
    Two aims of heifer estrus synchronization protocols are to induce prepubertal heifers to start cycling by the beginning of the breeding season and to shorten time spent in estrous detection. Use of progestins such as ...
  • Impact of increasing amounts of supplemental high-protein soybean meal on performance of range beef cows
    Mathis, C.P.; Cochran, R.C.; Woods, B.C.; Heldt, J.S.; Olson, K.C.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1998)
    One hundred and twenty spring-calving Hereford × Angus cows grazing low-quality, tallgrass-prairie forage were fed 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, or 6.0 lb soybean meal (SBM) per head daily. SBM as a source of ...
  • Influence of low-level fall supplementation with a self-fed, high-protein supplement and level of winter supplementation on performance of beef cows grazing tallgrass-prairie range
    Wickersham, T.A.; Cochran, R.C.; Dhuyvetter, D.V.; Grieger, D.M.; Farmer, C.G. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2001)
    An experiment was conducted to determine the effect of providing a small amount of a high-protein supplement during the fall and effects of increasing subsequent level of winter supplementation on cow-calf performance. One ...
  • Influence of low-level supplementation with a high-protein feed on performance of beef cows grazing tallgrass-prairie range during the fall
    Llewellyn, D.A.; Cochran, R.C.; Martson, T.T.; Grieger, D.M.; Farmer, C.G.; Wickersham, T.A.; Simms, D.D. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2003)
    An experiment was conducted to evaluate the effect of hand feeding a limited quantity of a high-protein supplement during the fall grazing period on cow and calf performance. The time of initiation of supplementation was ...
  • Is GnRH necessary at CIDR insertion using a 7-Day CIDR synchronization protocol for beef heifers?
    Eborn, D.R.; Blair, E.E.; Grieger, D.M. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2011)
    The EAZI-BREED CIDR is commonly used in estrous synchronization protocols for both beef heifers and cows. The label calls for insertion of a progesterone-impregnated controlled internal drug release (CIDR) for 7 consecutive ...
  • 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 ...