Extracting cells for culture destroys the blastocyst from which they are taken.
From the economist.com
Representative Z-stack image of a control and a knockdown blastocyst are shown.
From the nature.com
Her book points out that giving individual rights to a blastocyst is problematic.
From the economist.com
The blastocyst reaches the uterus at roughly the fifth day after fertilization.
From the en.wikipedia.org
At this point, the zygote becomes a blastocyst and the placenta starts to form.
From the en.wikipedia.org
This could prevent pregnancy by interfering with implantation of a blastocyst.
From the en.wikipedia.org
Interior to the blastocyst is a small group of about 30 embryonic stem cells.
From the economist.com
This brings the blastocyst nearer to the endometrium and also immobilizes it.
From the en.wikipedia.org
But the blastocyst that results from parthenogenesis does not become a viable fetus.
From the sciencedaily.com
More examples
The blastula of a placental mammal in which some differentiation of cells has occurred
The blastocyst is a structure formed in the early embryogenesis of mammals, after the formation of the morula. It is a specifically mammalian example of a blastula. ...
(Blastocysts) In mammals, the embryo at the 16-cell stage of development through the 64-cell satge when the embryo implants.
A preimplantation embryo of about 150 cells produced by cell division following fertilization. The blastocyst is a sphere made up of an outer layer of cells (the trophoblast), a fluid-filled cavity (the blastocoel), and a cluster of cells on the interior (the inner cell mass).
A very early embryo consisting of about 150-300 cells. A blastocyst may or may not implant into the uterus.
Multicellular embryo that is seen five to six days after fertilization.
The modified blastula stage of embryos, consisting of the inner cell mass and a thin trophoblast layer enclosing the blastocoele.
After a mammalian ovum is fertilised it begins to divide. The blastocyst is an early stage of this process which consists of a sphere that is fluid-filled and surrounded by a layer of cells, surrounding a fluid-filled cavity. There is a mass of cells at one side which will become the embryo. ...
An early stage in development of an embryo, when the cells are not yet differentiated into organs.