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Biology of Reproduction|December 1, 1992
Exogenous progesterone and progestins as used in estrous synchrony regimens do not mimic the corpus luteum in regulation of luteinizing hormone and 17 beta-estradiol in circulation of cowsN Kojima, T T Stumpf, A S Cupp, et al.
Journal of Animal Science|February 1, 1993
Yearling bulls shorten the duration of postpartum anestrus in beef cows to the same extent as do mature bullsA S Cupp, M S Roberson, T T Stumpf, et al.
Biology of Reproduction|February 1, 1995
Dosage of the synthetic progestin, norgestomet, influences luteinizing hormone pulse frequency and endogenous secretion of 17 beta-estradiol in heifersT Sanchez, M E Wehrman, F N Kojima, et al.
Journal of Animal Science|May 1, 1991
Influence of growth rate and exposure to bulls on age at puberty in beef heifersM S Roberson, M W Wolfe, T T Stumpf, et al.
Biology of Reproduction|August 1, 1993
Increasing exogenous progesterone during synchronization of estrus decreases endogenous 17 beta-estradiol and increases conception in cowsM E Wehrman, M S Roberson, A S Cupp, et al.
Biology of Reproduction|February 1, 1995
Increasing concentrations of 17 beta-estradiol has differential effects on secretion of luteinizing hormone and follicle-stimulating hormone and amounts of mRNA for gonadotropin subunits during the follicular phase of the bovine estrous cycleA S Cupp, F N Kojima, M S Roberson, et al.
Biology of Reproduction|October 1, 1994
Differential regulation of gonadotropin synthesis and release in ovariectomized ewes after treatment with a luteinizing hormone-releasing hormone antagonistT Sanchez, M E Wehrman, G E Moss, et al.
Biology of Reproduction|February 1, 1995
Melengestrol acetate at greater doses than typically used for estrous synchrony in bovine females does not mimic endogenous progesterone in regulation of secretion of luteinizing hormone and 17 beta-estradiolF N Kojima, J R Chenault, M E Wehrman, et al.
Biology of Reproduction|March 1, 1992
A similar distribution of gonadotropin isohormones is maintained in the pituitary throughout sexual maturation in the heiferT T Stumpf, M S Roberson, M W Wolfe, et al.
Biology of Reproduction|November 1, 1993
Pregnancy rate is greater when the corpus luteum is present during the period of progestin treatment to synchronize time of estrus in cows and heifersT Sanchez, M E Wehrman, E G Bergfeld, et al.
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