Brazil's Supreme Court will rule today (March 5) on the linkurl:legal status; of scientists using human embryos, following an appeal that embryonic stem cell research is "unconstitutional." In March 2005, the Brazilian parliament passed legislation allowing scientists to work with stem cells derived from human embryos. That law approved research with embryos produced by in vitro fertilization and frozen for at least three years. But only months later, in May 2005, then-Attorney General Cláudio Fonteles petitioned the Supreme Court to repeal the law, arguing that it was unconstitutional because it violates the right to life. Today's decision comes amid pleas from both sides of the debate. linkurl:On Friday,; Brazilian church officials urged the court to ban the use of human embryos. Meanwhile, some scientists have spoken out in favor of the research. "Brazil has the potential to be a significant leader in this field," Bernard Siegel, the executive director of...

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