نتایج جستجو برای: thermal maturation
تعداد نتایج: 273028 فیلتر نتایج به سال:
Objective: The role of growth factors, including vascular endothelial growth factor of activated omentum on mitosis is clearly known, though not on all the aspects of in vitro oocyte maturation. This study was designed to assess the effect of activated-omental extract (AOE) on in vitro maturation (IVM) of rat cumulus-oocyte complexes (COCs). Materials and Methods: In this experimental study, th...
Besides their role in making energy, polyunsaturated fatty acids can affect on ovarian follicles and corpus luteum by providing the precursors required for the synthesis of signaling molecules such as steroids and prostaglandins. The effects of α-linolenic acid (ALA) on developmental competence of oocytes in goats were evaluated in this study. Initially, ALA content of follicular fluid of small...
objective: crocin is an active ingredient of saffron (crocus sativus l.) and its antioxidant properties have been previously investigated. this carotenoid scavenges free radicals and stimulates glutathione (gsh) synthesis; consequently, it may protect cells against oxidative stress. the aim of this research is to protect oocytes from oxidative stress by the addition of a natural source antioxid...
Introduction: Superovulation produces complications in some patients, so invitro maturation of oocytes is used to decrease or eliminate these complications and improve IVF. Moreover, IVM is used for different aspects of reproductive researches. Slaughterhouse ovaries are the main source of oocytes for IVM and IVF studies. Different media has been introduced and experimented for in vitro maturat...
Background: In vitro maturation (IVM) of immature oocyte is a promising treatment option for infertile women.IVM procedures attempt to mimic the natural conditions of the follicular environment. The technique of IVM of oocytes has been successful after the first trial using culture of human oocytes in follicular fluid. The crucial part of this technique is the maturation process itself, and the...
Background: Different culture media are used for in vitro maturation of ovine oocyte. The Weymouth medium are used for in vitro maturation of rat and mice oocytes with very low levels of supplementation (Just FBS, while to acquire the good results in TCM hormone, and serum supplementation and in some cases growth factor are necessary to gain the optimized results. The aim of the present study w...
background: linoleic acid (la) is a polyunsaturated fatty acid present in high concentrations in follicular fluid, when added to maturation culture media, it affects oocyte competence.objective: in the present study, we investigated effect of linoleic acid supplementation on in vitro maturation, embryo development and apoptotic related gene expression in ovinematerials and methods: the experime...
Changes in the D/H ratio of sedimentary organic matter (SOM) during thermal maturation have been difficult to interpret because the effects of hydrogen exchange and kinetic fractionations are confounded in natural samples. Recent analytical developments have significantly improved our understanding of the responsible mechanisms. In this paper, we review experimental and field data that document...
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