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Showing 1 to 16 of 16 for “"superovulation"”.
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Embryo Production by Superovulation and Dual Siring in Alpacas
… order to accelerate the genetic gain of a herd, superovulation and embryo transfer techniques can be used to produce multiple embryos from genetically superior females. We hypothesized that the use of superovulation and dual siring results in the production of multiple embryos sired by both of …
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Repeated Superovulation With Non-Surgical Recovery of Embryos in Dairy Cows
Made available in DSpace on 2014-12-14T15:29:41Z (GMT). No. of bitstreams: 1 8004220.pdf: 3121314 bytes, checksum: cde9b786ca5d7df8bb7bef59c44ceef3 (MD5) Previous issue date: 1979
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Die Bedeutung der Embryonenqualität im Rahmen des Embryotransfers beim Rind – eine Literaturstudie
… of the variable embryo qualities after superovulation and the different possibilities to assess the embryo quality. After superovulation there are always variable embryo quality observed. The reasons for this are versatile. An important, the result of a superovulation treatment …
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Control of endometrial secretion in cattle and production of transgenic swine
… and sows to evaluate estrous synchronization/superovulation schemes. Pronuclear microinjection and zygote culture in excised mouse oviducts also was assessed. Synchronization/superovulation procedures were: 1) sows observed for estrous behavior (NAT), 2) cyclic gilts synchronized with …
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Effects of a superovulatory dose of pregnant mare’s serum gonadotropin on uterine morphology, carbohydrate histochemistry and serum steroids in immature rates
… problem in both humans and domestic livestock. Superovulation with exogenous gonadotropins in conjunction with in vitro fertilization and embryo transfer is one method used to treat this problem. However, superovulation is associated with a decreased pregnancy rate. The objective of this …
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Methods to enhance embryo quality and recovery rates in superovulated beef cows
… HP maintained their CL during superstimulation. Superovulation protocol included decreasing dosages of follicle stimulating hormone twice daily over 4 days and timed artificial insemination performed twice (12 hours apart). A greater proportion of quality grade 1 embryos were recovered from the …
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The Effects of Low Temperature on Survival of Rabbit Ova
… the female gametes will become practical. Superovulation or a means of stimulating those animals like the cow which usually produce one ovum at a time to produce infinitely more is paramount. Such problem as the collection of produce infinitely more is paramount. Such problem as the …
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Uncovering a fundamental mechanism underlying female oocyte quality and RASopathies using C. elegans as a model system
… (IVF) where ectopic ERK activation during superovulation through hormonal stimulation may diminish oocyte quality and influence zygotic development.</p>
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Sexual Dimorphism in Susceptibility to Age-Dependent Metabolic Disorders in Mice Born through ICSI
… (e.g., washing, culture, injection, etc.) and/or superovulation protocol used for oocyte collection. Given that epigenetic alterations may not necessarily cause lethality, it is not surprising that the ICSI babies are mostly born "healthy". However, the long-term potential adverse effects of …
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Strategies to improve in vitro maturation of human and mouse oocytes
… of view, it could diminish or avoid the use of superovulation drugs, thus reducing treatment length, costs and the risk of severe ovarian hyperstimulation syndrome (OHSS) and other adverse side-effects associated with hormonal stimulation. Other potential benefits include the provision of a …
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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
… d on the diets, all cows were treated to induce superovulation (28.8 mg FSH/cow, Folltropin) and synchronize estrus. After the detection of estrus each cow was inseminated with semen from one of four Holstein bulls. Embryos were collected 7 d after estrus and evaluated for quality (according to …
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Fortpflanzungsphysiologie und assistierte Reproduktion beim Haushund (Canis familiaris) - eine Literaturstudie
… induction of a fertile oestrus cycle as well as superovulation by hormone treatment are not available. Canine oocytes may resume meiosis spontaneously in vitro, although at a much lower efficiency than in most other domestic species. In vitro maturation (IVM) of oocytes results in 20 to 70 % …
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Assistierte Reproduktion beim Pferd
… that there is no practical method available for superovulation in the mare. The majority of equine embryos are therefore collected from spontaneously ovulating mares. Synchronisation of the oestrous cycle of the donor and recipient mare before transfer is of major importance. In synchronized …
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Validation of the obese Ossabaw miniature pig as a model of the obese polycystic ovary syndrome phenotype with concomitant metabolic syndrome: exploration of polycystic ovary syndrome pathophysiology using in vivo and in vitro
… OSS sows responded to a long-term GnRH agonist superovulation protocol similarly to OSS sows on a control diet; 8) the theca cells of OSS gilts did not demonstrate basal differences in the gene expression of steroidogenic enzymes but did respond to in vitro LH stimulation with increased …
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Factors Important to the Efficiency of Artificial Insemination in Single-Ovulating and Superovulated Cattle
To identify factors important to the efficiency of artificial insemination in cattle, four studies were conducted. In the first study, the addition of cream to the inseminate was used in an attempt to increase accessory sperm number. On d 6 after insemination, 60 embryos were evaluated. The …
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Investigating the role of PABPC5 in mouse physiology
… and there were fewer MII oocytes following superovulation. First litter fecundity remained unaffected. In conclusion, PABP5 is not essential for development and survival of mice into adulthood but might play a role in female reproductive function later in life, as well as in immune function. …