early in the development of many animals, before transcription begins, any change in the pattern of protein synthesis is attributed to a change in the translational activity or stability of mrna in the egg and early embryo. as a result, translational control is critical for a variety of developmental decisions, including oocyte maturation and initiation of preimplantation development. in this s...

Goal To estimate probabilistic maturation reaction norms (PMRNs) for age and size at maturation of chum salmon in South Korea. It has long been realized that the proportion of mature fish at any given age and size affects a stock's population dynamics and thus influences the potential yield that can be extracted from the stock. It is thus important to disentangle the environmental and evolution...

The critical maturation time of central otolith neurons in processing spatial orientations was examined in Sprague-Dawley rats. With the use of immuno-hybridization histochemical methods, we observed c-fos expression in vestibular nuclear neurons responding to transverse movement on the horizontal plane as early as P7 and those to antero-posterior stimulation as early as P9. In the inferior oli...

Recently GnRH antagonist protocols for the prevention of a premature LH surge were introduced, allowing final oocyte maturation to be triggered with a single bolus of a GnRH agonist (GnRHa). GnRHa is as effective as hCG for the induction of ovulation, and apart from the LH surge a FSH surge is also induced. Until recently, prospective randomized studies reported a poor clinical outcome when GnR...

Cell regulation of Ph(+)cell proliferation and differentiation has been studied ex vivo in various chronic myeloid leukemia (CML) patients. The regulation is provided by alternation of effective stages of proliferation and maturation with inhibition of Ph(+) cell proliferation by accumulating neutrophils under apoptosis blockage. The alternation of stages consists of switching stage 1 (effectiv...

Growth in body size is a key life-history trait that has coevolved and interlinked with maturation, maximum age, mortality, generation time, the intrinsic rate of population growth. parameters are therefore required inputs majority assessment models used conservation or fisheries management. However, because difficulties involved proper aging individuals, growth unknown for vast species. Here, ...

conclusion for more precise prediction of successful aavf maturation after spta, short-term follow-up doppler ultrasonography (< 2 weeks) was useful. if the asr was < 0.7 or if residual stenosis was ≥ 30%, immediate repeat spta is recommended. results the technical and clinical success rates were both 94.9% (56/59); the mean asr was 0.84. an asr of ≥ 0.7 and no significant residual stenosis (< ...

introduction: the purpose of this study was to evaluate the effect of different doses of retinoic acid on resumption of meiosis, in vitro maturation of oocytes and resulting embryo development in mice. materials and methods: germinal vesicle of nmri female mouse (6-8 weeks old) oocytes were collected from ovaries and cultured in maturation medium mem-α contained: 100 mliu/ml rfsh + 7.5 iu/ml hc...

background   objective:   materials and methods   results   conclusion   key words:   . vitrification, viability, in vitro maturation, gvbd, oocyte, mouse : these results suggest that step-wise vitrification of gvbd oocytes as compared to single step vitrification was better in the rate of survival and in vitro maturation of oocytes. : all non-vitrified oocytes were viable after 24 hr; however,...