Browsing Dairy Day, 1987 by Author "Call, E.P."

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Browsing Dairy Day, 1987 by Author "Call, E.P."

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  • Cow-side milk progesterone testing
    Call, E.P.; Stevenson, J.S. (Kansas Agricultural Experiment Station, 1987)
    Cow-side milk progesterone tests are effective in determining the presence of an active corpus luteum (CL) on the ovary. The test is best used as an adjunct to the Preventive Herd Health Program (PHHP) as a means of ...
  • Effect of production on reproduction
    Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    The genetic antagonsim that exists between production and reproduction is overcome by sound management practices. Kansas Holstein herds were ranked by quartile and analyzed by comparing various reproductive traits. Higher ...
  • Further studies utilizing hormones to alter estrous cycles and fertility
    Stevenson, J.S; Stewart, R.E.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    In one large dairy herd, we examined the reproductive performance of 943 cows following early postpartum hormonal therapy utilizing gonadotropin-releasing hormone (GnRH or Cystorelin®) and prostaglandin F2-alpha (PGF). ...
  • Gonadotropin-releasing hormone improves conception rates of repeat-breeders with previous reproductive disorders
    Stevenson, J.S.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    An experiment examining the benefit of treating repeat-breeders with 100 µg GnRH (Cystorelin ®) at the time of third or fourth insemination was conducted in 513 dairy cows of which 93 (abnormal cows) had been diagnosed ...
  • Influence of prebreeding progesterone plus prostaglandin F2-alpha on estrus and fertility in lactating dairy cows
    Mee, M.O.; Stewart, R.E.; Stevenson, J.S.; Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    Progesterone administered before breeding may increase estrous expression and subsequent fertility in lactating dairy cows. Holstein cows (n=302) were assigned randomly at calving to three groups. Cows received no ...
  • USDA-DHIA Sire Summaries-AI Advantage
    Call, E.P. (Kansas Agricultural Experiment Station, 1987)
    USDA-DHIA Sire Summaries are published semiannually and provide the dairy industry with an accurate evaluation of the transmitting ability of bulls for milk and milk components. Genetic potential is established at the ...