Results 171 to 180 of about 36,504 (227)
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Archives of Gynecology and Obstetrics
Epigenetic changes include all modifications affecting the expression of genes without changing the nucleotide sequence of the genome. Most studied epigenetic changes include DNA methylation, histone alterations and non-coding RNAs. DNA methylation is an important epigenetic mark, protecting the genome during gametogenesis and early embryo development.
Neda Sindik +2 more
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Epigenetic changes include all modifications affecting the expression of genes without changing the nucleotide sequence of the genome. Most studied epigenetic changes include DNA methylation, histone alterations and non-coding RNAs. DNA methylation is an important epigenetic mark, protecting the genome during gametogenesis and early embryo development.
Neda Sindik +2 more
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An update on ecdysone signaling during insect oogenesis.
Current Opinion in Insect Science, 2019An overview is presented of the different functions of ecdysone signaling during insect oogenesis. An extensive genetic toolkit allowed analysis with unprecedented temporal and spatial detail in Drosophila where functions were revealed in stem cell ...
L. Swevers
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Ecotoxicology and Environmental Safety, 2019
Quantum dots (QDs), considered as a type of excellent semiconductor nanomaterial, are widely employed and have a number of important applications. However, QDs have the potential to produce adverse effects and toxicity with the underlying molecular ...
Man Qu +7 more
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Quantum dots (QDs), considered as a type of excellent semiconductor nanomaterial, are widely employed and have a number of important applications. However, QDs have the potential to produce adverse effects and toxicity with the underlying molecular ...
Man Qu +7 more
semanticscholar +1 more source
Zygote, 2017
SummaryRecently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals.
Tania Janeth, Porras-Gómez +1 more
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SummaryRecently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals.
Tania Janeth, Porras-Gómez +1 more
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Minerva Ginecologica, 2018
Ovarian tissue is increasingly being collected from cancer patients and cryopreserved for fertility preservation. Alternately to the autologous transplantation, the development of culture systems that support oocyte development from the primordial follicle stage represent a valid strategy to restore fertility.
Fabbri R +5 more
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Ovarian tissue is increasingly being collected from cancer patients and cryopreserved for fertility preservation. Alternately to the autologous transplantation, the development of culture systems that support oocyte development from the primordial follicle stage represent a valid strategy to restore fertility.
Fabbri R +5 more
openaire +3 more sources
Oogenesis in an Adult Prosimian
Nature, 1970IN most Eutherian mammals oogenesis, that is, mitotic proliferation of oogonia followed by the formation of oocytes in the arrested diplotene stage of meiosis, occurs only during embryonic life or the first weeks of postnatal life1. Certain prosimians seem to be exceptions to this general rule.
H, Butler, M B, Juma
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A review of echinoderm oogenesis
Journal of Electron Microscopy Technique, 1990AbstractThis review of the anatomical, histological, biochemical, and molecular biological literature on echinoderm oogenesis includes the entire developmental history of oocytes; from their inception to the time they become ova. This is done from a comparative perspective, with reference to members of the five extant echinoderm classes; crinoids ...
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The Role of Nourishment in Oogenesis
Annual Review of Entomology, 1996Sexual receptivity is female behavior that allows or helps a male to fertilize her eggs; through this behavior, females play an active role in reproduction. Multiple signals may be used for receptivity or unreceptivity. Insect species exhibit three ontogenetic patterns of receptivity: cyclic, in which females alternately become receptive and ...
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Oogenesis as a foundation for embryogenesis
Molecular and Cellular Endocrinology, 2002The majority of oocytes in postnatal ovaries are small, non-growing and reside in primordial follicles. They have to undergo a prolonged phase of growth and differentiation before nuclear and cytoplasmic maturation enables them to resume meiosis and undergo fertilization.
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Cytoplasmic Inclusions in Oogenesis
1965Publisher Summary This chapter focuses on the cytoplasmic inclusions in oogenesis, and discusses the structure and functions of the Golgi apparatus and mitochondria in eggs and their role in vitellogenesis. Investigation of Golgi apparatus in eggs is beset with special difficulty because of the presence of yolk, which becomes enormous in quantity as ...
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