Results 221 to 230 of about 260,428 (269)
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Sex related embryo development
Theriogenology, 2001Although sexual dimorphic development in the mammalian embryo prior to differentiation of the gonad has been documented, there are many seemingly conflicting observations and gaps in our understanding of this process. Conditions that influence the process include gamete interaction, that might give one sex and advantage in the fertilization process and
Kochhar, H.P.S. +2 more
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Cripto in tumors and embryo development
Biochimica et Biophysica Acta (BBA) - Reviews on Cancer, 2001The discovery of a new gene with unknown functions and encoding a protein with novel characteristics left us with the puzzling question of a suitable name for it. The name cripto [1] was chosen to indicate that the main characteristic of this novel gene was the di¤culty in ¢nding its function.
Persico MG +5 more
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Quality control of embryo development
Molecular Aspects of Medicine, 2013Although in recent years we have seen an undeniable improvement in the field of reproductive biology and medicine, the efficiency of in vitro fertilization (IVF) procedures remains relatively low, ranging from 4% to 40% depending on the patient's age. It is believed that this is in a large part caused by inaccurate assessment of embryo quality prior to
Ajduk, Anna, Zernicka-Goetz, Magdalena
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Zinc deficiency and the developing embryo
Biological Trace Element Research, 1985The effect ofin utero zinc deficiency on fetal development in rats is reviewed. Attention is paid to the primary biochemical lesion associated with zinc-related teratogenesis and special consideration is given to the central nervous system. Evidence is presented that the thymidine kinase salvage pathway, used for the synthesis of thymidine ...
I E, Dreosti, I R, Record, S J, Manuel
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2002
The current state of artificial incubation practices in the poultry industry should be prefaced with a brief description of the development of the chicken embryo. Nutrients needed for the development of avian embryos are obtained from the food material stored in the egg rather than from nutrients derived from the blood supply of the mother, as in the ...
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The current state of artificial incubation practices in the poultry industry should be prefaced with a brief description of the development of the chicken embryo. Nutrients needed for the development of avian embryos are obtained from the food material stored in the egg rather than from nutrients derived from the blood supply of the mother, as in the ...
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Auxin Regulation of Embryo Development
2014Important steps in plant development are made shortly after fertilization. In a brief succession of cell divisions, the zygote is transformed into an embryo, a multicellular structure carrying all fundamental tissue types and the meristems. Hence, embryogenesis offers excellent opportunities to dissect the molecular control and cellular mechanisms ...
Rios, Alejandra Freire +2 more
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The Development of Somites in the Chick Embryo
Development, 1963ABSTRACTIn two groups of experiments the so-called ‘somite centres ‘were removed from chick blastoderms. Nevertheless, well-developed somites formed. It is concluded, therefore, that the ‘somite centres’ are not essential for somite formation. The same experiments, and others which are described, also provided evidence that somites can form in the ...
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In vitro development of the mammalian embryo
Journal of Experimental Zoology, 1983AbstractNormal growth and differentiation of mammalian embryos in vitro during the preimplantation period appear to be dependent upon the availability of appropriate metabolic substrates. For preimplantation embryos, defined conditions of culture have been achieved only in a few laboratory species.
M K, Sanyal, F, Naftolin
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Programmed development in the mouse embryo
Development, 1984The programmed development of the embryo involves the specification of cells in space and in time. Specification of cells according to their location is evidently achieved by a process of cell interaction and the recognition of relative cell position.
M H, Johnson +2 more
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Peroxiredoxins in Gametogenesis and Embryo Development
2007Reactive oxygen species have been implicated in gametogenesis and embryo development in animals. As peroxiredoxins are now recognized as important protective antioxidant enzymes as well as modulators of hydrogen peroxide-mediated signaling, we addressed here the putative role of this novel family of peroxidases in gamete maturation and during ...
Isabelle, Donnay, Bernard, Knoops
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