While most scientists vouch for the safety of genetically modified organisms, many laymen remain unconvinced

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All new fertility methods sound crazy at first. Yet it’s important to understand that mitochondrial replacement isn’t genetic engineering run amok, cautions Debra Mathews of the Berman Institute of Bioethics at Johns Hopkins University. “No one is messing directly with genes,” she says. “Scientists are replacing damaged mitochondria with healthy mitochondria.”

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