منابع مشابه
Ultrastructural studies of the mouse blastocyst substages.
The mouse blastocyst stage covers approximately 2 days. During this period, embryonic development advances through four ultrastructurally distinct substages. Specific ultrastructural characteristics, such as changes in cell shape and/or the distribution of intracellular organelles, may be used to characterize the various cell types from each other at each substage (e.g. trophoblast from inner c...
متن کاملA maternal factor affecting mouse blastocyst formation.
Normal development of the mouse embryo requires the presence of both paternal and maternal genomes. This is due to functional differences having their origin in a differential imprinting of parental genomes. Furthermore, several lines of evidence show that the very early interactions between egg cytoplasm and pronuclei may influence the programming of the embryonic genome and modulate the funct...
متن کاملMouse blastocyst previtrification interventions and DNA integrity.
OBJECTIVE To assess the effect of implementing different previtrification interventions on the postwarming DNA integrity of vitrified blastocysts. DESIGN Prospective in vitro study. SETTING Center for Reproductive Medicine laboratory in a tertiary hospital setting. ANIMALS A total of 70 expanded and 46 nonexpanded mouse blastocysts were used for the study. INTERVENTION(S) [1] Twenty-two...
متن کاملMaking the blastocyst: lessons from the mouse.
Mammalian preimplantation development, which is the period extending from fertilization to implantation, results in the formation of a blastocyst with three distinct cell lineages. Only one of these lineages, the epiblast, contributes to the embryo itself, while the other two lineages, the trophectoderm and the primitive endoderm, become extra-embryonic tissues. Significant gains have been made...
متن کاملAmino acid transport in mouse blastocyst compartments.
Properties of uptake and exchange of L-methionine associated with the compartments of the blastocyst were examined in the mouse embryo. The inner cell mass (ICM) was derived from the 102 h blastocyst by immunosurgical procedures and studied in isolation. The ICM possessed strong exchange and efflux transport character. The Vmax of transport was about one-fifth that of the intact blastocyst, but...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1975
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.72.12.5099