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Related to blastocysts: Blastocystis hominis


The modified blastula that is characteristic of placental mammals. Also called blastodermic vesicle.

blas′to·cys′tic adj.


1. (Biology) Also called: blastosphere the blastula of mammals: a sphere of cells (trophoblast) enclosing an inner mass of cells and a fluid-filled cavity (blastocoel)
2. (Biology) another name for germinal vesicle


(ˈblæs tə sɪst)

the blastula of the mammalian embryo consisting of an inner cell mass, a cavity, and the trophoblast.


(or blastula) A hollow ball of cells formed from a morula about five days after fertilization.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blastocyst - the blastula of a placental mammal in which some differentiation of cells has occurred
blastosphere, blastula - early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
References in periodicals archive ?
2] concentrations have poor blastocysts qualities because of the increased accumulation of reactive oxygen species (ROS) in mammalian embryos [5].
A significantly higher percentage of blastocysts derived from [alpha]-MEM (51.
It is well known that growth and blastocysts at the 8-cell stage need a more complex environment, but the recent formulation of highly specialized media has permitted the preservation of blastocysts in vitro (8-10).
Penzias and fellow committee members reviewed national data from 2013 that showed similar pregnancy rates for women aged 42 years and younger who received a single euploid blastocyst or two untested blastocysts.
It has been postulated that different toxic compounds such as ammonia and reactive oxygen species (ROS) produced by low quality embryos have deleterious effects on quantity and quality of developed blastocysts (3).
The researchers have developed a technique that allows blastocysts to develop in vitro beyond the implantation stage, enabling researchers to analyzes for the first time key stages of human embryo development up to 13 days after fertilization.
Furthermore, there was a marked contrast between blastocysts generated in vivo versus in vitro regarding expression patterns of lipid metabolism and oxidative stress response [14], highlighting the importance of lipid regulation for embryo quality.
Cell numbers of blastocysts injected with different concentration of PGA groups were significantly lower than those injected with 560 ng/uL Npm group (P<0.
It should be pointed out that many authors have proposed some other systems for grading of blastocysts as well [18, 32-34].
Embryo development is an extremely complex process and while our system may not be able to fully reproduce every aspect of this process, it has allowed us to reveal a remarkable self-organising capacity of human blastocysts that was previously unknown," Marta Shahbazi, a researcher at the University of Cambridge who co-authored one of the studies, said in a statement.