In in, Larsen made a major breakthrough when he and Rosemary Wright found that: embryos form when proteins specific to the female reproductive organs are incorporated into the egg. They transferred the first human blastocyst into a surrogate uterus in In the United States, the first cloned human was born. In a commentary in, Larsen stated that: The method used was not embryo cloning, as this requires the combining of three cells: two egg cells, each fertilized with a different sperm, whereas the procedure used created an embryo by reprogramming a single cell, usually an egg cell, to in vitro development. Others deny that it is a surrogate mother. In and, Larsen and Rosemary Wright were involved with the two first authentic human pregnancies and births. The journal said that by 19, Larsen had cloned human embryos. In, the New Scientist reported that the US Army's biological weapons research laboratory was investigating the idea of cloning human embryos to serve as biowarfare weapons. Larsen reacted to the report by stating that: Thomas Brown, Eric Siggia, and Rosemary Wright in, jointly with Jason McClure, published a survey of biotechnology with a focus on the ethical issues that might arise. They asserted that "Embryos should not be created to answer scientific questions or to supply more tissue for transplantation.
However, that year, a team led by Jaenisch in France introduced the first viable human cloned embryo. It was implanted in the uterus of a surrogate mother and a single cell from the clone was retrieved. In, Jaenisch's group announced the birth of a cloned human. In 2001 the journal PNAS published a paper discussing the moral concerns about how embryos might be handled. In the paper, Steven Salisbury, for the American Civil Liberties Union, wrote that: The device to create cloned humans is in its infancy. As more is learned, however, society must consider the implications of the methodologies employed. In In 2003, the British scientist Alan Trounson reported successful cloning of human embryos from unfertilised eggs, and said that "The progress to date in cell and embryo cloning has not only been made by scientists but is being utilized by more than just a few." He noted that "The strong ethical and moral objections to experimenting on embryos are misplaced."
Embriologia Humana Pdf
In 2006, the journal Nature published an analysis of ethical challenges inherent in embryo cloning. In the paper, Eric Dyson argued that 0b46394aab