Results 171 to 180 of about 208,388 (190)

Genetics of polarity in mammalian embryos

Reproductive BioMedicine Online, 2005
This brief review is devoted to the genetic control of polarity and embryonic axes in preimplantation mammalian embryos. Discussion is related to their formation, the considerable variations in gene activity in these early phases of development, and the influence of timers over polarities and related aspects of development.
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Junctional Complexes in the Early Mammalian Embryo

Seminars in Reproductive Medicine, 2000
Preimplantation embryos generate intercellular junctions during differentiation of the trophectoderm epithelium and the formation of the blastocyst. These membrane complexes comprise gap junctions, adherens junctions, tight junctions, and desmosomes, each performing fundamental roles in cellular communication, adhesion, and differentiation.
Fleming, T.P., Ghassemifar, M.R., Sheth, B.   +2 more
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Chapter 1 Ontogeny of Erythropoiesis in the Mammalian Embryo [PDF]

, 2008
Red cells are required not only for adult well-being but also for survival and growth of the mammalian embryo beyond early postimplantation stages of development. The embryo's first "primitive" erythroid cells, derived from a transient wave of committed progenitors, emerge from the yolk sac as immature precursors and differentiate as a semisynchronous ...
Kathleen E. McGrath, James Palis
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Cryopreservation of Mammalian Embryos

2000
Embryo cryopreservation is now routine for major experimental and domestic animals. The absence of effective embryo cryopreservation technologies for other animals may result in major loss of genetic diversity. “Delipation” enables cryopreservation of the cryosensitive embryos.
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Identification of Sex in Mammalian Embryos

1986
One of the uncertainties in reproduction of farm animals, regardless of whether one considers natural reproduction or reproduction assisted by artificial insemination or embryo transfer, is sex of the resulting off spring. This uncertainty can be of significant consequence when the economic value of one sex is considerably greater than that of the ...
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Cryopreservation of Mammalian Eggs and Embryos

1986
In the decade since reliable methods of freezing mouse embryos were first described (Whittingham et al., 1972; Wilmut, 1972a) methods have been developed for freezing the embryos of a number of other species. Frozen embryos have been used in the treatment of human infertility, in farm animal breeding, and in biological research. During this period, the
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Immunoprobe localization in mammalian embryos

Proceedings, annual meeting, Electron Microscopy Society of America, 1990
Visualization of preimplantation mammalian embryos by electron microscopy is difficult due to the large size of the ircells, their relative lack of internal structure, and their highly hydrated cytoplasm. For example, the fertilized egg of the mouse is a single cell of approximately 75μ in diameter with little organized cytoskelet on and apaucity ofor ...
Patricia G. Calarco, Margaret C. Siebert
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Cryobiology: Preservation of Mammalian Embryos

1986
The preservation of mammalian embryos has become a routine procedure. Thousands of live offspring have been produced from frozen-thawed embryos transferred into recipient foster mothers. Species whose embryos have been successfully preserved include mouse, rat, rabbit, sheep, goat, cattle, horse, antelope, baboon, and human.
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IMMUNISATION OF THE MAMMALIAN EMBRYO

The Lancet, 1947
W. A. Hemmings, F.W. Rogers Brambell, W. T. Rowlands   +2 more
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Electroporation into Cultured Mammalian Embryos

2009
Over the last century, mammalian embryos have been used extensively as a common animal model to investigate fundamental questions in the field of developmental biology. More recently, the establishment of transgenic and gene-targeting systems in laboratory mice has enabled researchers to unveil the genetic mechanisms underlying complex developmental ...
Noriko Osumi, Masanori Takahashi, Tadashi Nomura   +2 more
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