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Embryos at Biology News

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

Scientists in Belgium have discovered how to clone human embryos from eggs that have been matured in the laboratory. Their discovery should make it easier for scientists to create embryonic stem cell lines from cloned embryos and develop them to provide eggs and sperm for infertile couples, the 21st annual conference of the European Society of Human Reproduction and Embryology heard today (Monday...

Most embryos produced during IVF do not result in live births

Researchers at Yale School of Medicine have found that 85 percent of embryos transferred during in vitro fertilization fail to become live births, highlighting the need for improving diagnostic techniques to identify viable embryos. Published in the August issue of Fertility and Sterility, the study reviewed seven years of U.S. statistics from all the fertility clinics that report data on...

Changes to embryos can elicit change in adult fish

In a study illustrating the apparent linkages between the evolutionary development and embryonic development of species, researchers have uncovered the genetic elements that determine the structure and function of a simple biomechanical system, the lower jaw of the cichlid fish. In addition, they've shown that increasing expression of a particular gene in an embryo can lead to physical changes in...

Embryos tell story of Earth's earliest animals

Much of what scientists learn about the evolution of Earth's first animals will have to be gleaned from spherical embryos fossilized under very specific conditions, according to a new study by Indiana University Bloomington and University of Bristol researchers in this week's Proceedings of the National Academy of Sciences. Purported animal embryo fossils have been reported continuously o...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

Researchers at the Forsyth Institute have discovered a new mechanism responsible for early left/right patterning, the process by which organs locate themselves on the left or right side of the body. The discovery of this novel mechanism, garnered through the study of three different vertebrates (frogs, chickens and zebrafish), marks the first time that a single common mechanism has been identif...

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Miscarriage linked to late embryos

The later a fertilised egg implants in a woman's uterus, the more likely she is to have a miscarriage, new research has found.The report in the latest New England Journal of Medicine details the most precise information the timing of implantation - the true start of pregnancy - influences its success or failure. Fertilised eggs can attach themselves to the lining of the womb anywhere f...

Organs made from cloned embryos

Using building material from cloned cow embryos, scientists say they have constructed miniature kidneys that appear to function similar to genuine organs. Embryos contain master cells called stem cells that have the potential to grow into any tissue in the body.// In this case, they grew the embryos to the stage where they could identify cells destined to become kidney cells. While it is still un...

Cloning of human embryos for stem cells made possible

Korean scientists have been able to clone human embryos for creating stem cells that may be used to help //patients with diseases or injury. The newly created stem cell lines are an exact match with the patients’ DNA and immune systems. . This research have provided new insight into using stem cells cloned from the persons to use it on them as a treatemnt. This is for the first time...

Successful creation of human embryos from a single parent for the first time

Parthenogenesis refers to reproduction by the development of an unfertilized egg or development of eggs from females without fertilization by spermatozoa. Sounds interesting right? Hang// On! This is not all. Scientists have been successful in creating so-called parthenotes, early-stage embryos that are made from a single egg, without the need for sperm. The researchers have so far create...

Frozen embryos stored in Britain

About 117,619 frozen embryos are stored in Britain. They are living balls of human cells suspended in liquid nitrogen at sub-zero temperatures, waiting for their lives to begin again. // Lois Walker was one among them and was conceived in October 1997, but was born in April 2000. Her gestation period lasted for more than two years. Lois is now 5 years old. Lois had been an eight-celled...

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Infertile Voice Supports Stem Cell Research: RESOLVE Calls for Patient Options in Using Frozen Embryos

New survey shows more than half of infertile couples willing todonate unused embryos for stem cell research BETHESDA, Md., June 20, 2007 /PRNewswire/ -- RESOLVE: TheNational Infertility Association issued the following statementtoday, in anticipation of President Bush's veto of federallegislation that would loosen current limitations on stem cellresearch: "President Bush is choosin...
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