Blastocyst in Biological News

New test can detect both genetic and chromosomal abnormalities in embryos

... cystic fibrosis. The embryos had developed to the blastocyst stage, which is about five days after ... of a single cell biopsied from embryos at the blastocyst stage, can provide highly accurate analysis for ... it should be possible to vitrify embryos at the blastocyst stage, either before or after biopsy, and analyse ...

Single thawed embryo transfer after PGD does not affect pregnancy rates

... genetic diagnosis (PGD) and freezing at the blastocyst stage has become a real option after researchers ... the next appropriate stage of development the blastocyst stage. At this point, 32 couples who had two or more embryos that had successfully reached the blastocyst stage were offered the option of having one ...

Female human embryos adjust the balance of X chromosomes before implantation

... on. As the cells carry on dividing and reach the blastocyst stage, the cells that will go on to form the ... solid cluster of approximately 16 cells) and the blastocyst stage (about five days after fertilisation when ... the XIST signal grew stronger at the morula and blastocyst stages. "Our results are the first to show ...

Recipe for capturing authentic embryonic stem cells may apply to any mammal, study suggests

... in early development. The inner cell mass is a cluster of cells inside the blastocyst that goes on to form the embryo. Authentic embryonic stem cells are ... are produced when embryonic stem cells are inserted into a developing blastocyst and those stem cells go on to contribute to a normal embryo with cells of ...

Human embryonic stem cells developed from 4-cell embryo; world first may lessen ethical concerns

... of established hESC lines have been derived from the inner cells at the blastocyst stage; these are said to be pluripotent. "Previously, scientists have been ... 4-cell stage embryo, allowing the remaining three cells to develop into a blastocyst (five day embryo) which could be transferred into the uterus and develop ...

October 2008 Biology of Reproduction highlights

... preimplantation culture environments. Hugh D. Morgan, Xing L. Jin, Aiqing Li, Emma Whitelaw, and Chris O'Neill. The Culture of Zygotes to the blastocyst Stage Changes the Postnatal Expression of an Epigentically Labile Allele, Agouti Viable Yellow, in Mice. Biol Reprod 2008; 79: 618-623. Published ...

Oosight microscope enables embryonic stem cell breakthrough

... Next, they inserted the genetic material from the skin cells of an adult male rhesus monkey into the eggs and allowed them to grow to the blastocyst stage. From these cloned embryos, the researchers obtained two viable stem cell lines that are genetically identical to the adult male monkey. We ...

Cloned mice created from fully differentiated cells, a milestone in cloning research

... Yet, even for cloning of an embryo to the blastocyst stage, from which embryonic stem cells can be ... embryonic stem cells; 49 percent developed to the blastocyst stage and 18 cloned pups were born. "Our ... cells, T cells and neurons had failed beyond the blastocyst stage. Only with a second step that involved ...

Cloned stem cells prove identical to fertilized stem cells

... never perfect, and nearly all cells in a cloned blastocyst retain some memory of their original source. As a ... that a small number of stem cells in the blastocyst appear to be spared this faulty reprogramming. When stem cells from a cloned blastocyst are removed and placed into a dish, most die. A ...

Researchers offer proof-of-concept for Altered Nuclear Transfer

... body. However, to cull these stem cells, the blastocyst must be destroyed, which some critics insist is ... cell, its DNA is altered so that the resulting blastocyst has no chance of ever becoming a viable embryo. ... embryo to grow a placenta. In order to create a blastocyst that cannot implant in a uterus, the researchers ...

Researchers report technique for freezing and preserving genetically enhanced pig embryos

... eggs before fertilizing them with muscle cells from a male pig containing modified genetic material. The resulting embryos were then frozen at the blastocyst stage. Upon thawing, embryos were transferred to surrogate female swine. Embryos placed in the oviducts of two surrogates led to pregnancies that ...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

... a long way to go and many problems to overcome before he and his colleagues could reach their goal. "None of these early embryos developed to the blastocyst stage, and failure to do so could reveal some problems in gene activation, especially in cloned embryos. So, first we have to understand how to get ...

Scientists succeed in cloning human embryos from eggs matured in the lab

... a long way to go and many problems to overcome before he and his colleagues could reach their goal. "None of these early embryos developed to the blastocyst stage, and failure to do so could reveal some problems in gene activation, especially in cloned embryos. So, first we have to understand how to get ...

SuperLigands - a database of ligand structures derived from the Protein Data Bank

... removed. This method is called "somatic cell nuclear transfer" or SCNT. Next, oocytes with the patient's genetic material were allowed to grow to the blastocyst stage, an early stage of embryo development. Stem cells were then derived from the inner cell mass of the blastocyst. In laboratory culture, these ...

Scientists generate patient-specific stem cells, Science study says

... removed. This method is called "somatic cell nuclear transfer" or SCNT. Next, oocytes with the patient's genetic material were allowed to grow to the blastocyst stage, an early stage of embryo development. Stem cells were then derived from the inner cell mass of the blastocyst. In laboratory culture, these ...