Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"the estrous cycle"”.
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Ascorbic acid and the reproductive cycle : ascorbic acid and the estrous cycle
Thesis (M.S.)--Michigan State University. Dept. of Food Science and Human Nutrition, 1974
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Variation in Social Behavior Throughout the Estrous Cycle of a Captive Killer Whale <i>Orcinus orca</i>
<p>The study of cetaceans in captivity provides information on behavior, acoustics, reproduction and physiology that is often difficult to obtain with free-ranging populations. The present study examined the influence of the estrous cycle of a captive female killer whale on the rate, duration, …
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Evaluation of the Hypothalamic Kisspeptin System Throughout the Estrous Cycle and During the Attainment of Puberty in Gilts
… to affect reproductive cyclicity and the attainment of puberty in multiple species, presumably through its actions on GnRH and LH, as demonstrated in other species. Kisspeptin administration causes increased plasma concentrations of LH in pigs, sheep, and rats. Two experiments were …
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Evaluation of uterine lumenal proteins in dairy cattle at known stages of the estrous cycle and in ovarian steroid treated ovariectomized cows
The uterine protein milieu of cyclic and ovariectomized (ovx) cows treated with estradiol-17S (E-2) and progesterone (P) alone or in combination was studied by various biochemical methods. Uterine lumenal fluids (UF) were collected nonsurgically via a foley catheter. Sephacryl S-200 chromatography …
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Effect of naloxone on serum luteinizing hormone concentrations during the early postpartum period and the estrous cycle in primiparous and multiparous holstein cows
Four experiments were conducted to investigate the effect of naloxone, an opioid receptor antagonist, on pituitary LH secretion in Holstein cows during two periods after parturition and two phases of the estrous cycle. In experiment 1, 24 cows (12 primiparous; 12 multiparous) received either saline …
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Role of Endogenous Dopamine in Regulation of Anterior Pituitary Hormone Secretion During Early Postpartum and Various Stages of the Estrous Cycle in Holstein Cows
The role of endogenous dopamine, utilizing a dopamine antagonist (fluphenazine; FLU), in modulation of gonadotropin, growth hormone (GH) and prolactin (PRL) secretion during the early postpartum period and various stages of the estrous cycle was investigated in Holstein cows. Experiment 1 was …
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Prostaglandin metabolism in the ovine corpus luteum
The goal of the research comprising this dissertation was to gain insight into the relative importance of luteal biosynthesis of prostaglandin and possible catabolism of PGF2α by the corpus luteum. Expression patterns of two enzymes (cyclooxygenase-2 and 15-hydroxyprostaglandin dehydrogenase) …
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Evaluation of the 7 and 7 synch protocol for control of the estrous cycle among beef cows prior to fixed-time artificial insemination with sex-sorted or conventional semen
… 1 was conducted to compare 7 and 7 Synch and the 7-day CO-Synch + controlled internal drug release (CIDR[copyright]) protocols prior to fixed-time artificial insemination (FTAI) of beef cows with conventional or sex-sorted semen. Cows (n = 1,538) were blocked based on age and days postpartum …
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Control of endometrial secretion in cattle and production of transgenic swine
… from cows to determine effects of day of the estrous cycle, location of the ovulatory structure and progesterone (P₄) on endometrial protein secretion. Day 0 (estrus) endometrial tissue released more protein than tissue collected on d 9, 14 or 18. Protein synthesis was greater on d 0 and …
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Progesterone and Prolactin Profiles of the Female Asian Elephant (Elephas Maximus)
… daily (around estrus), weekly (throughout the estrous cycle), and bimonthly (during gestation) in 8 female Asian elephants. A total of 18 estrous cycles with 4 resulting in conception are described. Early gestational values are shown in 4 animals, with 2 animals followed to term. Serum …
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The long-term effects of reproductive experience on the neurobiology of anxiety and its treatment: a cross species approach in female rats and women
This thesis investigated the impact of two female-specific experiences – the reproductive (estrous/menstrual) cycle and reproductive experience (pregnancy/maternal interactions) – on anxiety and its treatment. Following a literature review in Chapter 1, Chapters 2-3 examined whether reproductive …
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DNA damage and repair during the mammalian hormonal cycle
The aim of this study was to determine the pattern of DNA damage and repair during the mammalian female hormonal cycle. This was done to determine whether the hormonal cycle must be taken into account when DNA damage and repair studies are done in female subjects, especially so when surrogate …
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Synchronization of estrus, conception rate, and embryonic mortality in beef cattle following treatment with progesterone-releasing intravaginal devices or melengestrol acetate in conjunction with PGF₂α
The objective of these experiments was to determine the effects of and/or interactions among estrous synchronization treatments, reproductive status, and stage of the estrous cycle on estrous response (ER), first service conception rates (CR), pregnancy rates (PR), and embryonic mortality (EM) …
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Factors affecting estrogen excretion in dairy heifers
… affecting estrogen excretion in dairy heifers. The objective of the first study was to quantify estrogenic activity in feces and urine during the estrous cycle. Ten non-pregnant Holstein heifers were fed the same diet for 28 d. Plasma, feces, and urine samples were collected daily. Plasma 17-β …
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Evaluation of salivary progesterone profiles as an indicator of reproductive status in equines
… genital examination, or on intractable mares. Of the reproductive hormones, progesterone (P4) is one of the most commonly measured hormones in the field of equine reproduction. Serum concentration of P4 from mares is usually evaluated using an extracted radioimmunoassay (RIA). The use of RIA for …
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Disrupted female reproductive cyclicity and gonadotropin-releasing hormone neuron dysfunction in a mouse model of temporal lobe epilepsy
… with temporal lobe epilepsy (TLE). However, the neural mechanisms linking epilepsy to comorbid reproductive endocrine disorders are unknown. In the intrahippocampal kainic acid (IHKA) mouse model of TLE, we observed that more than 60% percent of KA-injected mice showed disrupted estrous …
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