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 25 for “"Estradiol levels"”.
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Disrupted female reproductive cyclicity and gonadotropin-releasing hormone neuron dysfunction in a mouse model of temporal lobe epilepsy
… firing rates on diestrus. Progesterone and estradiol levels in KA-injected females were also different from control, suggesting altered sex hormone negative feedback may contribute to the changes in GnRH neuron firing activity. In KA-injected males, only GnRH neurons in the medial septum …
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The aryl hydrocarbon receptor signaling pathway and adverse reproductive outcomes
… body mass index, smoking status, and low estradiol levels may increase the risk of experiencing these debilitating menopausal symptoms. However, these risk factors do not fully explain why women have hot flashes and sleep disturbances and why these symptoms vary between and within women. …
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Reproductive Endocrinology of the Ozark Hellbender, Cryptobranchus Alleganiensis Bishopi
… were performed to measure the concentrations of estradiol, progesterone, and testosterone. Estradiol concentrations in females increased throughout July, when gonadal changes were first observed, and remained high during the time when oocytes were maturing and breeding took place. In males, …
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Effects of Diet on Ovarian Development in Largemouth Bass, Micropterus Salmoides
… in plasma concentration of testosterone and 17!3-estradiol were monitored by radioimmunoassay. The relationship between these parameters were significantly different during the months of March through July. Body weight and length of the forage fed fish were greater than the pellet fed bass. …
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Effects of 17β-estradiol on learning and memory and strategy use during a hole board spatial navigation task in aged male rats
<p>Treatment with 17β- estradiol has been shown to ameliorate age related deficits in spatial learning and memory as well as to promote the use of an allocentric strategy during spatial navigation. While the majority of research using 17β- estradiol has been done using females rodents, there have …
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The effects of adult exposure to genistein on female reproductive outcomes
… the potential to mimic, enhance, or impair the estradiol biosynthesis pathway, and is categorized as an endocrine disrupting chemical. This is of concern to human health because genistein-induced effects on the steroidogenic pathway can result in adverse, long-term effects on female fertility, …
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Prevalence of Low-Energy Availabilty Amongst Female Paralympic Athletes
… for LEA using LEAF-Q. Triiodothyronine (T3) and estradiol levels were within normal range for all participants. Insulin-growth factor (IGF-1) was elevated ( > 13.1-39.2 nmol/L) in 22% of athletes. Five participants (56%) had clinically low BMD in the hip regional score ( < -2 z-score), one of …
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Sex as a Biological Variable in Preclinical Animal Studies with an Infectious Disease Exemplar.
… in CD45 expression associated with elevated estradiol levels. Vaginal microbiota composition remained stable across individuals, with increases in Mobiluncus spp. observed only during peak progesterone levels rather than throughout the secretory phase. This work establishes a framework for …
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Role of the ARF Tumor Suppressor in Osteoclasts
… we found that Cathepsin K loss enhances serum estradiol levels. Together, this data suggests that Cathepsin K-driven Cre will not consistently result in OC-specific gene loss and may lead to misinterpretation of phenotypes generated to study the function of OC genes. In parallel, we have …
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Ecotoxicological Investigations in Effluent-Dominated Stream Mesocosms
… 80 µg/L Cd treatments reduced male circulating estradiol levels and critical swimming performance. Future studies are needed to assess impacts of environmental estrogen exposure on fish calcium metabolism and vertebral integrity.
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Reproductive Biology and Conservation Genetics of the Alligator Snapping Turtle (Macrochelys Temminckii)
… plastron-to-vent length, and testosterone levels were used to determine gender of smaller individuals. To ensure accurate sexual assignment when studying M. temminckii, data from multiple methods (morphological measurements, ultrasonography, testosterone levels, and, laparoscopy) should be …
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Neonatal exposure to estradiol in female rats influences neuroactive steroid concentrations and behaviour in the adult rat
The gonadal steroids, in particular estradiol, exert an important action during perinatal period in the regulation of sexual dimorphism and neuronal plasticity, and in the growth and development of nervous system. Exposure of the developing female to estrogens during perinatal period may have …
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Circadian rhythm of cortisol and estradiol in healthy women
… <p>CIRCADIAN RHYTHM OF CORTISOL AND ESTRADIOL IN HEALTHY WOMEN</p> <p>by</p> <p>KARYN G. BUTLER</p> <p>AUGUST 2011</p> <p>Advisor: Dr. Jean E. Davis</p> <p>Major: Nursing</p> <p>Degree: Doctor of Philosophy</p> <p>Daily variation in human processes and behaviors has been identified …
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Physical Activity, Estrogen Replacement Therapy and Bone Mineral Density in Early Postmenopausal Women
The influence of high and low levels of physical activity on bone mineral content (BMC) and bone mineral density (BMD) was investigated in 60 healthy, Caucasian, early postmenopausal women. All women examined were a minimum of two but no more than five years past natural menstrual cessation. …
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Estrogen and Cognitive Functioning in the Menopause Transition
… to repeatedly assess the relationship between estradiol levels and subjective and objective cognitive ability within the same perimenopausal woman, allowing for the detection of any transient cognitive weaknesses and their possible relation to temporarily low levels of estradiol. Participants …
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Reproductive Parameters of Nesting <em>Caretta caretta</em> on Georgia's Barrier Islands
… female nesting fecundity. Plasma steroid levels and ultrasonography were used to determine the population trends and nesting patterns for female <em>C. caretta</em> along Georgia's barrier islands. The reproductive status of nesting <em>C. caretta</em>was assessed at Wassaw and Blackbeard …
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Mechanisms by which di(2-ethylhexyl) phthalate and mono(2-ethylhexyl) phthalate disrupt ovarian folliculogenesis and steroidogenesis
… Daily exposure to DEHP results in measureable levels of the chemical and its metabolite mono(2-ethylhexyl) phthalate (MEHP) in human blood, urine, amniotic fluid, umbilical cord blood, breast milk, and ovarian follicular fluid samples. This is of public health concern because DEHP and MEHP are …
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Changes of breast cancer growth and metastasis in murine models modulated by an aromatase inhibitor, a low calcium diet or a high fat diet
… stimulated BC primary tumor growth in mice. Estradiol stimulated ER negative BC metastasis in mice. Based on foregoing studies, the hypothesis of this study is that the aromatase inhibitor letrozole may inhibit BC metastases to lungs by suppressing estrogen synthesis. BC growth on the bone …
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Controlled cultivation techniques for the recovery of threatened fishes in Virginia
… prior to the spawning season at 6.5 ng/mL, but levels were not correlated with male gonadosomatic values. Plasma 17β-estradiol levels in females peaked just prior to the spawning season at 15 ng/mL, and were correlated with gonadosomatic values. Captive margined madtoms did not tank spawn unless …
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Sex differences in human perinatal development and autism
… steroid theory proposes that exposure to higher levels of prenatal sex steroids (e.g., prenatal androgens and estrogens) that are on average higher in male fetuses are associated with higher likelihood for autism and elevated autistic traits. This background literature is reported in Chapter 1. …
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