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 16 of 16 for “"male reproduction"”.
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The Influence of Estrogen Signaling on Male Reproduction in Medaka (Oryzias latipes)
… xenoestrogens has led to detrimental effects on male reproduction. In fish, observed effects include sex reversal, presence of testicular oocytes, altered courting behavior, vitellogenin synthesis in males, altered fertility and gonadal histopathology. Understanding how xenoestrogens exert their …
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Endocrine, cellular and molecular effects of diabetes mellitus on male fertility
… As such, diabetes has the potential to affect male fertility at a number of levels. Despite this, the prevalence of reproductive disturbances in diabetic men remains largely unknown. This study was carried out to evaluate the effects of diabetes on functional, endocrine, cellular and molecular …
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The role of dietary arachidonic acid and docosahexaenoic acid in preventing the phenotype observed with highly unsaturated fatty acid deficiency
… DHA and consists of ulcerative dermatitis, male infertility, gastrointestinal ulcers, and hepatic lipidosis. New insight on specific AA and DHA roles was established through dietary prevention of HUFA deficiency phenotype. The absence of a D6D isozyme had to be assessed before further …
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Genetic Structure of the Copperhead (Viperidae: Agkistrodon Contortrix Mokasen) at its Most Northern Distribution
… contortrix</em>), other than to evaluate male reproduction in a laboratory setting and phylogenetic history. Thus, employing DNA-based molecular techniques to study the natural history of <em>A. contortrix</em> will broaden our knowledge of molecular ecology in North American pitvipers, …
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A Functional Role of Estrogen in the Efferent Ductules of the Male Reproductive Tract
… of estrogen in the efferent ductules (ED) of the male mouse reproductive tract at various biological levels. In spite of knowing the presence of high concentrations of estrogen and the existence of estrogen receptor (ER), ERalpha and ERbeta, in the male reproductive tract, a role for estrogen in …
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Reproductive physiology, avian malaria, and the cloacal microbiome in tropical Rufous-collared Sparrows (Zonotrichia capensis)
… a hormone that mediates several key aspects of male reproduction, yet little is known about the causes and consequences of variation in testosterone. Using rufous-collared sparrows (Zonotrichia capensis), a Neotropical songbird with a wide distribution, I explored geographical patterns of …
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Dynamic changes of TDP-43 in testicular and epididymal sperm
… worldwide struggles with infertility with male factor accounting for half the cases, highlighting the importance of better understanding the mechanisms regulating spermatogenesis and sperm maturation. The goal of the present study was to evaluate the dynamic changes of TDP-43 from late …
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A retrospective analysis of semen samples and reproductive hormones in Africa and the middle east
… is the cornerstone for the investigation of male infertility. Semen quality can be influenced by geographical location, age, ejaculatory abstinence, and season. In 2010, the WHO published criteria for human semen characteristics that were markedly lower than those previously reported. Many …
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Hepatic Element Concentrations and Gross and Histological Examinations of Spring Migrating Lesser Scaup (Aythya affinis) in the Upper Midwest
… decline included the affects of contaminants on reproduction, and identification of diseases which may have a negative impact on general health and body condition. The objectives of this study were (1) to measure hepatic concentrations of several important elements in lesser scaup during spring …
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The effects of green tea, green rooibos and their major flavonoids (EGCG and aspalathin) on testicular cell health in vitro
The testes play a central role in the male reproductive system, as they represent the sites of male sex steroidogenesis and of spermatogenesis. Leydig cells, located at the testicular interstitium, produce predominantly testosterone upon stimulation with either chorionic gonadotropin (CG) or …
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Genetic parameters and genomic analysis of semen quality and fertility traits in pigs
… and pedigree animals. Expanding the frontiers of reproduction studies in pigs, another important field to be explored in breeding programs is the boar fertility. Reproductive traits, such as gestation length (GL), total number of piglets born (TNB) and stillborn (SB) are some of the bottleneck …
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Expression and function of basigin during early pregnancy and spermatogenesis
… that plays an important role in both female and male reproduction since female knockout (KO) mice are infertile and male KO mice are sterile. The aim of the present study was to determine 1) whether BSG is required for proliferation of the uterine luminal epithelium during early …
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DEVELOPMENT OF NOVEL BIOTECHNOLOGICAL APPROACHES FOR ACCELERATING GENETIC GAIN IN THE BOVINE
… of this work was placed on the generation of male haploid cells in bovine species. However, in vitro spermatogenesis remains a major challenge in large mammals and has, to date, been successfully accomplished only in rodents. To address this limitation, a stepwise approach was adopted to …
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The effects of environmentally relevant toxicants on female reproduction and embryo development
… because have they been shown to impair normal reproduction function in males and females. However, studies have primarily focused on male reproduction. Studies have shown that phthalates are detected in both female reproductive organs and fluids. Measurable amounts of phthalates are present in …
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The effects of an environmentally relevant phthalate mixture on female reproduction
… extremely vulnerable to toxicants. In mammals, females are born with a finite pool of primordial follicles, and the size of primordial follicle pool determines the reproductive lifespan. To form the finite pool of primordial follicles, germ cells must undergo mitosis, formation of germ cell nests, …
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Making Sense of a Loss: Masculinities and Assisted Conception in Contemporary Iran
… dominantly considered a ‘woman’s problem’; male (in)fertility is hardly recognised or discussed in families, society, or the social sciences. This dissertation is based on 14 months of ethnographic fieldwork, including interviews with men (n=17), their partners, and ARTs experts (n=20), as …