blastocyst

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Related to blastocysts: Blastocystis hominis

blastocyst

 [blas´to-sist]
the mammalian conceptus in the post-morula stage, consisting of the trophoblast and an inner cell mass.
Early blastocyst. From Dorland's, 2000.

blas·to·cyst

(blas'tō-sist),
The modified blastula stage of mammalian embryos, consisting of the embryoblast or inner cell mass and a thin trophoblast layer enclosing the blastocystic cavity or blastocele.
[blasto- + G. kystis, bladder]

blastocyst

/blas·to·cyst/ (-sist) the mammalian conceptus in the postmorula stage, consisting of an embryoblast (inner cell mass) and a thin trophoblast layer enclosing a blastocyst cavity.

blastocyst

(blăs′tə-sĭst′)
n.
The modified blastula that is characteristic of placental mammals. Also called blastodermic vesicle.

blas′to·cys′tic adj.

blastocyst

[blas′təsist]
Etymology: Gk, blastos + kystis, bag
the embryonic form that follows the morula in human development. Implantation in the wall of the uterus usually occurs during this stage, approximately 8 to 13 days after fertilization. The blastocyst consists of an outer layer (trophoblast) which is attached to the inner cell mast.
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Early blastocyst

blastocyst

A pre-implantation embryo consisting of a thin-walled hollow sphere of 16–40 cells, which appears in early mammalian development, the wall of which is the trophoblast. The embryo proper corresponds to a mass of cells at one side, which is equivalent to the blastula.

blas·to·cyst

(blas'tō-sist)
The modified blastula stage of mammalian embryos (including human), consisting of the embryoblast (inner cell mass) and a thin trophoblast layer enclosing the blastocystic cavity.
Synonym(s): blastodermic vesicle.
[blasto- + G. kystis, bladder]

blastocyst

The state of the development of the embryo at about eight days after fertilization, when implantation in the wall of the womb occurs. At this stage it consists of a double-layered sphere full of fluid. The outer layer, the trophoblast, forms the placenta, the inner layer forms the future fetus.

blastocyst

the BLASTULA of mammals, differing from that of lower vertebrates in consisting of an outer wall of cells, the TROPHOBLAST, by which the embryo implants in the uterus, and in having an inner cell mass, the embryonic disc, from which the embryo is formed.

Blastocyst

A cluster of cells representing multiple cell divisions that have occurred in the fallopian tube after successful fertilization of an ovum by a sperm. This is the developmental form which must leave the fallopian tube, enter the uterus, and implant itself in the uterus to achieve actual pregnancy.
Mentioned in: Infertility

blastocyst

the mammalian conceptus in the post-morula stage, consisting of the trophoblast, an inner cell mass, and a central, fluid-filled cavity.
References in periodicals archive ?
The percentages of blastocysts derived from BCB+, BCB-, and control oocytes were determined on day 7.
The same test was used to determine to statistical significance in the cell number of blastocysts among experimental groups without arcsine transformation.
The difference in the proportion of hatched blastocysts was insignificant among the groups (Table 1).
Hwang's team showed that the DNA in the stem cells had distinct paternal and maternal sets of chromosomes, as cumulus cells do, rather than the two copies of a single set of chromosomes that would result from an unfertilized egg cell forming a blastocyst.
We found that treatment with AlaGln+GlyGln dipeptides may play an important role in reducing the accumulation of ammonia in the culture medium and increase the rates of oocyte maturation, fertilization, and development into blastocysts.
This cell divides several times until it has formed a ball of cells called a blastocyst (BLAS-tuh-sist).
They cannot become a fetus, as their blastocyst no longer exists, yet are very similar, if not identical, to the 20 or so primordial cells from which the embryo develops.
In theory, eight identical animals can be produced from each blastocyst.
Porcine blastocysts were cultured on mitotically inactivated mouse embryonic fibroblasts (MEFs) in pESC medium, which was a 50:50 mixture of low-glucose Dulbecco's modified Eagle's medium (Gibco/Invitrogen, Carlsbad, CA, USA; www.
PGD involves testing a day 5 embryo (blastocyst) for a specific known genetic abnormality, and preimplantation genetic screening (PGS) is screening of a blastocyst to determine if the chromosomes are normal.
James Thomson developed a technique to isolate and grow hESCs derived from human blastocysts.
Considered the largest study to date concerning vitrification, the authors suggest that cryotop is an efficient and reliable way to freeze cleavage embryos, blastocysts and oocytes in daily practice.