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.
Results
Showing 1 to 20 of 39 for “"gonadotropins"”.
-
Ovarian sensitivity of the prepubertal ewe to exogenous gonadotropins
Ovulatory response of prepubertal ewe lambs of Booroola Merino x Rambouillet (F+) and Rambouillet (++) breeding was compared after administration of 500 IU PMSG, 750 IU hCG, a combination of PMSG and hCG (500 IU PMSG followed by 250 IU hCG), 4, 8, 20, 30 or 40 mg of ovine pituitary extract or 12 mg …
-
Rough leucine auxotrophic strains of <i>Brucella</i> expressing <i>Salmonella</i> flagellin C conjugated gonadotropins, an immunocontraceptive brucellosis vaccine for feral swine population control
… neotomae</i> <i>ΔwboA ΔleuB</i> pNS4-trcD-fliC-Gonadotropins were discontinued in this effort towards a brucellosis immunocontraceptive dual-purpose vaccine due to lethality issues in mice. These stability and lethality issues are still under investigation. Instead, a proven stable strain of …
-
Priming with Oral Progestin Before Ovulation Induction Facilitates Ovarian Function in the Cat (Felis catus)
… and adverse residual effects caused by exogenous gonadotropins used to induce ovulation. Using the domestic cat as a research model, a new AI regimen that incorporated short-term ovarian suppression with oral progestin (altrenogest; ALT) before ovulation induction was investigated. The hypothesis …
-
Follicle stimulating hormone and steroidogenesis in ovarian granulosa cells during aging in the domestic hen
… in the responsiveness of ovarian follicles to gonadotropins.
-
Bone morphogenetic proteins (BMPs): new modulators of the follicle stimulating hormone (FSH) synthesis and release
… function requires the secretion of the gonadotropins, luteinizing hormone (LH) and follicle -stimulating hormone (FSH) synthesized by the gonadotrope cells. A tight control of the production of these hormones is crucial, particularly in females, to coordinate the terminal follicular …
-
The Role of Gonadotropic Hormones in Follicular Maturation of the Domestic Hen
The theme of this thesis is the role of gonadotropins in regulating follicular development and ovulation in the domestic hen, Gallus domesticus. These investigations focused on a role for methylation in the regulation of adenlyly cyclase (AC) activity and progesterone (P) secretion in granulosa …
-
Factors influencing in vitro maturation of pig oocytes
… Addition of 10% pFF in combination with gonadotropins during maturation provided the best environment for in vitro maturation with the highest percentage of oocytes reaching nuclear and cytoplasmic maturation. Addition of various levels of estrogen, progesterone and testosterone either …
-
Pathophysiology of Small Testes in Beef Bulls: Histopathological Features of Testes and Epididymides, Seminal Characteristics, and Endocrine Profiles (Testicular Hypoplasia, Degeneration, Breeding Soundness, Scrotal Circumference)
… The fact that these bulls were not deficient in gonadotropins suggested that the impairment in Leydig cell structure and function was caused by local factors, either the factors that caused the tubular damage or those consequent to the tubular damage. Hence, Leydig cell failure in these bulls may …
-
Localization of Luteinizing Hormone-Releasing Hormone (LHRH) in the Hypothalamus of Fetal Bovine
… (FSH) and Luteinizing Hormone (LH) are mammalian gonadotropins released from the anterior pituitary by Gonadotropin Releasing Hormone (GnRH) in the hypothalamus. Various analogs ofGnRH have been identified. Localization of these hormones is the first step in discovering the individual function of …
-
Activation of Novel Secretoneurin Circuits in Ovulating Zebrafish
… stimulates the synthesis and release of the gonadotropins hormone (Lh) and follicle stimulating hormone (Fsh) in the anterior pituitary. Gonadotropins trigger and regulate essential reproductive events including spermatogenesis, gametogenesis, oocyte maturation, ovulation, and modulates …
-
Endocrine markers of ovarian function: Clinical and biological aspects with focus on Anti Müllerian hormone
… with GnRHa and hormonal stimulation with gonadotropins to obtain multi-follicuar development prior to In Vitro Fertilization, the clinical pregnancy rate as well as the consumption of exogenous gonadotropins was inversely correlated to the mid-follicular LH levels. In conclusion, the …
-
Feeding strategies to enhance gilt reproduction and subsequent longevity and productivity in the breeding herd
… the growth and reproductive responses to gonadotropins in gilts fed on either AD or RS feeding bases using an ESF; and 3) to ascertain the effects of short-term increases in feed allowances on growth and sexual development in previously feed-restricted gilts using an ESF. Gilts employed in …
-
The relationship between gonadal hormones and neurocognitive functioning in healthy men and women and patients with schizophrenia
… influences of gonadal hormones and gonadotropins to cognitive performance. This was investigated in three studies. Study 1 examined the differences between healthy men and women on a sexually dimorphic cognitive battery (comprising mental rotation, modified judgement of line …
-
Dysregulation in polycystic ovary syndrome: mechanisms and therapeutic approaches
… to reality. This thesis examines the role of gonadotropins reproductive health, their connection to PCOS, and the promising research shaping the future of treatment.
-
G Protein and Androgen Signaling in Ovarian Function
… arrest in prophase I until ovulation when gonadotropins trigger a subpopulation of oocytes to resume meiosis in a process termed "maturation." Meiotic arrest is maintained through a mechanism whereby constitutive cAMP production exceeds phosphodiesterase-mediated degradation, leading to …
-
Structure and biological activity of avian hypothalamic luteinizing hormone-releasing hormone
… 1971b) and shown to stimulate the release of gonadotropins (luteinizing hormone and follicle-stimulating hormone) in a wide range of mammalian species (Schally et al., 1973, 1976). With the exception of amphibians, nonmammalian vertebrates have a poor gonadotropin response to synthetic …
-
Photoperiod and nutritional influences on reproduction, growth and pelage changes in the pine vole
… gland, increasing synthesis or release of gonadotropins. Adult pine voles on a declining or short photoperiod may be inhibited reproductively because of antigonadotropic substances produced by the pineal gland. Consuming apples could affect the degree of inhibition. It was hypothesized pine …
-
Markers of Circadian Disruption and Reproductive Risk Factors for Breast Cancer
… circulating reproductive hormones and precursor gonadotropins has been well documented in animal models, particularly those of seasonal breeders, yet elucidation of these complex hormonal relationships in humans has proven challenging. This work investigates the link between circadian disruption …
-
The regulation of the luteinizing hormone (LH) and the follicle stimulating hormone (FSH) by glucocorticoids and progestins
… model allowed the effects of MPA and NET on the gonadotropins at a transcriptional, post-transcriptional and secretion level to be tested. This study also investigated the effects of MPA, NET, dexamethasone (DEX, a GR agonist) and progesterone (P4, a PR agonist), in the absence and presence of …
-
Genetic Profiling of the Bovine Pituitary Gland Using cDNA Microarray Technology
… pituitary gland synthesizes and secretes the gonadotropins, luteinizing hormone (LH) and follicle stimulating hormone (FSH), which regulate steroidogenesis and follicular development. Currently, intrapituitary factors that modulate gonadotropin synthesis, storage, and release are not well …
Page 1 of 2