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  • Embryonic and hormonal control of ovine uterine arterial constriction

    Creator:
    Pope, William Frederick
    Abstract:
    The role of the conceptus and ovarian hormones in regulating ovine uterine vasoconstriction was investigated. The uterine artery ipsilateral to the ovary bearing the corpus luteum in ten nonpregnant and eight pregnant ewes was utilized in two experiments. Arteries of nonpregnant and pregnant ewes were removed at necropsy on day...
    Resource Type:
    Masters Thesis
    Full Text:
    constriction AN ABSTRACT OF THE THESIS OF WILLIAM FREDERICK POPE for the degree of MASTER OF SCIENCE in

  • Intrauterine migration of the porcine embryo

    Creator:
    Pope, William Frederick
    Abstract:
    The mechanism(s) involved with intrauterine migration of the porcine embryo was investigated. Twenty-four gilts on Days 6, 9 and 12 of gestation (Day 0 = 1st day of estrus) were utilized to examine the relationship between myometrial activity and intrauterine migration. On Day 2, embryos were flushed from one oviduct...
    Resource Type:
    Dissertation
    Full Text:
    OF THE THESIS OF WILLIAM FREDERICK POPE for the degree of DOCTOR OF PHILOSOPHY in ANIMAL SCIENCE

  • Prostaglandin F α-induced signal transduction mechanism regulating the secretion of oxytocin from the bovine corpus lutem

    Creator:
    Orwig, Kyle Edwin
    Resource Type:
    Dissertation
    Full Text:
    C (PKC) present in the bovine corpus luteum (CL) and their subcellular distribution. In addition

  • Embryonic mortality in pubertal gilts

    Creator:
    Archibong, Anthony Effanga
    Abstract:
    An experiment was conducted to compare the reproductive performance and serum concentrations of progesterone and estrogen of mated first (n=18) and third (n=18) estrous gilts slaughtered in equal numbers on days 3, 15 and 30 postmating. Fertilization rate did not differ between mated first and third estrous gilts. Embryonic survival...
    Resource Type:
    Dissertation
    Full Text:
    Fredrick Stormshak Abstract approv4iRedacted for Privacy David C.44gland An experiment was conducted to

  • Nongenomic inhibition of oxytocin binding by progesterone in ovine uteri

    Creator:
    Dunlap, Kathrin Anson
    Abstract:
    Effects of progesterone (P₄) and mifepristone (RU 486) on binding of oxytocin (OT) to its ovine uterine receptor (OTR) were studied in two experiments. Two additional experiments were conducted to evaluate specific binding sites for P4 in endometrial plasma membranes. In Exp. 1, ovariectomized ewes were injected with estradiol-17β (E₂)...
    Resource Type:
    Masters Thesis
    Full Text:
    )10 mg P4 + 10 mg RU 486. Endometrium removed on Day 11 was stored at -80°C until analyzed for OTR

  • Pituitary and uterine control of ovarian function in the gilt and ewe

    Creator:
    Chakraborty, Prabir Kumar, 1936-
    Abstract:
    The role of the pituitary gland and uterus in regulating ovarian function in the estradiol-treated gilt and ewe was investigated in two experiments. Pituitary gonadotropin content, ovarian follicular development and corpus luteum function were studied following daily intramuscular injection of seven gilts with 7 mg of 17β-estradiol from day 11...
    Resource Type:
    Dissertation
    Full Text:
    control ewes were incubated for two hours at 37°C under 95% 02-5% CO2 in Eagle's HeLa medium containing

  • Some effects of estradiol on ovine luteal function

    Creator:
    Akbar, Abulfatah Maqsood, 1938-
    Abstract:
    Some effects of 171β-estradiol on ovine luteal function were studied in five experiments. Estradiol injected into ewes on days 11 and 12 of the estrous cycle caused luteal regression in both intact and unilaterally hysterectomized ewes indicating that the presence of one uterine horn permits estradiol to cause luteolysis comparable...
    Resource Type:
    Dissertation
    Full Text:
    (Ginther, Pope and Casida, 1965, 1966), cow (Hansel and Wagner, 1960) and guinea pig (Ginther, Mahajan

  • Cellular mechanisms of altered bovine luteal function in response to exogenous gonadotropin-releasing hormone

    Creator:
    Bertrand, Jennifer Elaine
    Abstract:
    To determine whether membrane-related events may be involved in attenuated luteal function after gonadotropin-releasing hormone (GnRH) administration, corpora lutea (CL) were removed from 10 beef heifers on day 7 of the estrous cycle after i.v. injection of GnRH or saline on day 2 of the cycle. Luteal slices were incubated...
    Resource Type:
    Dissertation
    Full Text:
    response gene c-jun or release of OT by PGF2c, was not altered by GnRH injection (p>0.05). Injection of

  • Characteristics of preovulatory follicles of pubertal gilts

    Creator:
    Smith, Gary Daniel
    Abstract:
    Two experiments were conducted utilizing crossbred gilts to evaluate follicle characteristics at puberty and to determine the effect of exogenous estradio1-17β on embryonic mortality in the mature cycling gilt. Experiment 1 was conducted to compare preovulatory follicle numbers and sizes and follicular fluid concentrations of progesterone, estradio1-17β, plasminogen activator and...
    Resource Type:
    Masters Thesis

  • Gonadotropin releasing hormone-induced alteration of corpus luteum function in beef heifers

    Creator:
    Rodger, Lynn Dian
    Abstract:
    Two experiments were conducted to evaluate the effects of gonadotropin releasing hormone (GnRH) on the function of the bovine corpus luteum during the estrous cycle. In Experiment 1, 10 heifers were assigned randomly into two groups with each heifer serving as her own control. Heifers in Group I (n=5) were...
    Resource Type:
    Masters Thesis
    Full Text:
    labeled hCG (25,000 cpm/tube) was 38 incubated at 25°C for 16 hours with increasing concentrations of