blastocyst


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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 ?
BCB+, BCB-, and control groups were subjected to TUNEL analysis because the apoptotic index is another criterion for blastocyst quality.
Around 40% of three day-old embryos will develop into blastocysts, meaning they are considered to be embryos with a higher chance of pregnancy.
The blastocyst cell numbers, inner cell mass (ICM), trophectoderm (TE) and total cells, had been influenced neither by the type of IVM medium nor by the type of serum supplements.
Proportions between blastocyst development for the embryos in the two different thaw temperatures were analyzed using the Chi square test.
Scientist will then try to extract stem cells, which have the ability to grow into many different cell types, from the blastocyst.
The point of much of the above is the question of (certainly one of the questions with which we must deal), is a blastocyst a human being?
2 medium, (6,7) S1/S2 medium, (16) P1/Irvine Scientific Blastocyst medium, (17,18) IVF-50/G2, (15,19) IVF 50-S2, (5,11,17,19) Sydney IVF Cleavage/Blastocyst medium (20) and Quinn's Advantage sequential culture medium.
One herbicide (atrazine) and two insecticides (chlorpyrifos and turbufos) also reduced embryo development to blastocyst (all p less than or equal to] 0.
Although described as "therapeutic" cloning, Weissman has admitted that the resulting blastocyst, if implanted in a womb, would be fully capable of gestating into a full-term human baby.
By day 5 of culture, 40% of embryos in CM attained blastocyst stage, higher than 5% blastocyst formation for embryos exposed to FLU (P < .
About four days after fertilization, scientists extract the cells from the blastocyst (a hollow ball of cells holding them), and isolate them in a petri dish.
The blastocyst must be treated with respect appropriate to early human embryonic tissue.