Superovulation
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. Resposta superovulatória na primeira onda de crescimento folicular em doadoras Nelore (Bos indicus) / Superovulatory response during the first follicular wave in Nelore (Bos indicus) donors
Três experimentos foram realizados para testar a hipótese de que a resposta superestimulatória de doadoras Nelore (Bos indicus) com tratamentos iniciados próximo à ovulação durante a primeira onda de crescimento folicular seria maior ou comparável àquela decorrente de tratamentos convencionais. Os animais foram aleatoriamente alocados em três grupo
Publicado em: 2006
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14. β-carotene and FSH-P effects on follicular dynamics and embryo quality in Mangalarga Marchador mares. / Efeito do Beta Caroteno e do FSH - P sobre a dinÃmica folicular e qualidade embrionÃria em Ãguas mangalarga machador.
The objective was to evaluate the effect of β-carotene on superovulated mare embryo production and quality, as well as to asses FSH-P (FolltropinÂ) hability to induce superovulation. Sixteen Mangalarga Marchador brees donor mares were used, aged between 4 and 18 years, with sound reproductive history. Two β-carotene intra muscular dosages were tes
Publicado em: 2004
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15. Superovulation affects glucosamine trisaccharides in the glycocalyx of the rat endometrium at the time of implantation.
The presence of glucosamine trisaccharides in the glycocalyx of surface epithelial cells of the endometrium of hyperstimulated pregnant rats was compared with that of normal pregnant animals by means of lectin-avidin-ferritin histochemistry. The lectin Phytolacca americana was used. A statistically significant reduction in ferritin particles and hence, gluco
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16. Subfertility and defective folliculogenesis in female mice lacking androgen receptor
The roles of the androgen receptor (AR) in female fertility and ovarian function remain largely unknown. Here we report on the generation of female mice lacking AR (AR–/–) and the resulting influences on the reproductive system. Female AR–/– mice appear normal but show longer estrous cycles and reduced fertility. The ovaries from sexually mature AR�
National Academy of Sciences.
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17. Brain abnormalities, defective meiotic chromosome synapsis and female subfertility in HSF2 null mice
Heat shock factor 2, one of the four vertebrate HSFs, transcriptional regulators of heat shock gene expression, is active during embryogenesis and spermatogenesis, with unknown functions and targets. By disrupting the Hsf2 gene, we show that, although the lack of HSF2 is not embryonic lethal, Hsf2–/– mice suffer from brain abnormalities, and meiotic and
Oxford University Press.
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18. Exogenous gonadotropins--serum oestrogen and progesterone and the effect on endometrial morphology in the rat.
The serum levels of oestrogen and progesterone in hyperstimulated, pregnant rats were compared with those of normal pregnant animals. The endometrial morphology was studied before (4.5 days), at the time of (5.5 days) and after (6.5 days) implantation. In the hyperstimulated group serum oestradiol levels were significantly higher than in the controls at 2.5
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19. Generation and reproductive phenotypes of mice lacking estrogen receptor β
Estrogens influence the differentiation and maintenance of reproductive tissues and affect lipid metabolism and bone remodeling. Two estrogen receptors (ERs) have been identified to date, ERα and ERβ. We previously generated and studied knockout mice lacking estrogen receptor α and reported severe reproductive and behavioral phenotypes including complete
The National Academy of Sciences.
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20. Signaling by Hypoxia-Inducible Factors Is Critical for Ovulation In Mice
The steroid hormone progesterone, acting via its nuclear receptor, is a major regulator of the process of ovulation. Female mice lacking progesterone receptor (PGR) exhibit an anovulatory phenotype due to failure in follicular rupture. To identify the PGR-regulated pathways that control ovulation, we analyzed global changes in gene expression in the ovaries
The Endocrine Society.