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Showing 1 to 20 of 24 for “"embryo quality"”.
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MATERNAL DETERMINANTS OF OOCYTE AND EMBRYO QUALITY
Oocyte quality plays a critical role in establishment of pregnancies, embryo development, implantation and the health of offspring. The oocyte provides maternal factors necessary for the initial development of its embryo during the period of transcriptional silence. Despite the consistent increase …
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Methods to enhance embryo quality and recovery rates in superovulated beef cows
<p>Methods to enhance embryo quality and recovery rates in superovulated beef cows were investigated. In the first study, uteri from superovulated heifers on day of recovery were harvested immediately following exsanguination and sectioned into 3 segments per horn plus the oviduct (8 sections per …
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Label-free Optical Approaches for the Non-invasive Assessment of Embryo Quality
In assisted reproductive technologies, embryo quality is a key contributor to IVF success. Accurate assessment of embryo quality remains a challenge, which if overcome, would improve the ~30% success rate of IVF, which has remained stagnant or more than a decade. Current evaluations of embryo …
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Ovarian Response, Embryo Quality and Ectopic Pregnancy // Овариален отговор, качество на ембрионите и извънматочна бременност
Направен е ретроспективен и проспективен анализ на 1077 бременности след 2602 не-донорски IVF/ICSI свежи и размразени цикли, като са сравнени две основни групи спрямо изхода от АРТ - 976 случая (91%) вътрематочна бременност срещу 101 случая (9%) извънматочна бременност. Приложените методики бяха …
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Optimizing embryo culture conditions and spent culture media analysis as predictors of embryo quality and pregnancy
… evaluate various culture conditions to improve embryo development, and secondly, to analyze spent culture media for any biomarkers that may be predictive of embryo health. Single-step and sequential culture media were compared in both Planer and EmbryoScope™ incubators. Single-step media …
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Effects of Differences in Dietary Protein and Varying the Interval from Collection of Bovine Embryos to Freezing on Embryo Quality and Viability
… in dietary protein on the production and quality of bovine embryos collected from superovulated donors. Angus cows were randomly assigned to receive one of three experimental diets: a daily ration of 5.7 kg poultry litter, 2.0 kg hay, 3.1 kg corn, and 0.5 kg peanut hulls (LITTER; n = 15); …
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The effects of sperm dose, semen quality, and retrograde sperm blockage on accessory sperm number and embryo quality in the artificially inseminated bovine
… accessory sperm/ova and fertilization status/embryo quality. 3. Determine if mean number accessory sperm/ova or embryo quality are affected by semen quality. 4. Compare the percentage of morphologically normal accessory sperm with the percentage of normal cells in the inseminate. Using excised …
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Effect of high and low dosage of fresh and frozen semen on accessory sperm number, fertility and embryo quality in artificially inseminated cattle
… number per embry%vum and fertilization status/embryo quality if accessory sperm number were affected by treatment. In this study semen from four bulls routinely giving a minimum of 700/0 morphologically normal and 600/0 motile sperm cells were used. Ejaculates of these bulls were split and …
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Die Bedeutung der Embryonenqualität im Rahmen des Embryotransfers beim Rind – eine Literaturstudie
… describe the importance of the estimation of the quality of cattle embryos in embryo transfer as well as to discuss the causes of the appearance of the variable embryo qualities after superovulation and the different possibilities to assess the embryo quality. After superovulation there are always …
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The Impact Of Mitochondria On Preimplantation Development In The Rhesus Macaque
… these advances, determination of oocyte and embryo quality remains largely subjective. Ascertainment of methods to measure oocyte and embryo quality to improve selection in ART clinics and increase pregnancy success rates is imperative. These methods are only possible with a more …
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In vitro assessment of fertilization and embryo development with Bovine spermatozoa after scrotal insulation
Fertilization and cleavage of bovine embryos depend not only on maternal involvement, but also on the paternal contributions that involve more than just providing the haploid male genome. Therefore, the overall objective of this project was to determine the impact of morphologically abnormal …
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Effects of prepartum plane of nutrition during mid- or late gestation on beef cow BW, BCS, blood hormone concentrations, and preimplantation embryo
… hormone concentrations, and preimplantation embryos. In Exp. 1, multiparous Angus and Angus x Simmental cows (n = 33; BW = 664 ± 78 kg) were fed diets formulated to provide 3 planes of nutrition: 100% NRC energy and protein requirement (REQ), 70% NRC requirement (70%REQ) or 130% NRC …
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Metabolic Regulation and Cryotolerance of In Vitro-Produced Holstein Embryos
<p><em>In vitro</em> production and transfer of embryos has become a common practice within the dairy industry to efficiently breed superior animals and meet the consumption demand of the growing population. Cyropreservation is necessary for the application of commercialized embryo transfer, …
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Embryo and Gamete Development Upon Exposure to CCA Components: CrO3, CuO, and AS2O5
<p>Production of functional gametes and healthy embryos is essential for proliferation of all vertebrates, especially humans. Many compounds have toxic effects on developing gametes and embryos among which are chromium trioxide (CrO<sub>3</sub>), cupric oxide (CuO) and arsenic pentaoxide …
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Role of oocyte-secreted factors in prevention of cumulus cell apoptosis and enhancement of oocyte developmental competence.
… the first 9 hour of IVM. Also, OSFs improved embryo quality as evident by increased blastocyst total and trophectoderm cell numbers. These results were further verified in neutralization experiments of the exogenous growth factors and of the native OSFs. Follistatin and the kinase inhibitor …
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Post-Transfer Outcomes in Cultured Bovine Embryos Supplemented with Epidermal Growth Factor, Fibroblast Growth Factor 2, and Insulin-Like Growth Factor 1
… Use of in vitro fertilized (IVF) bovine embryos has become increasingly popular to help alleviate several of these reproductive issues and provide a means to enhance genetic gain for production traits. An uterine paracrine factor cocktail containing epidermal growth factor (EGF), …
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Fat and Fructose Consumption Affects Pre-pubertal Gilt Reproductive Tissues and Early Embryogenesis
… follicular fluid affect oocyte competence and embryo development. The follicular fluid of females consuming high fructose and fat diets did not alter nuclear maturation of oocytes (p>0.10). There were, however, detrimental effects on subsequent development of embryos, especially blastocyst …
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