mitochondrial disease mitochondrial disease
Marina Muun for NPR

Her Son Is One Of The Few Children To Have 3 Parents' DNA

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A scientist from the Nadiya Clinic in Kiev, Ukraine inserts a needle into a fertilized egg to extract the DNA of a man and woman trying to have a baby. The clinic is combining the DNA from three different people to create babies for women who are infertile. Rob Stein/NPR hide caption

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Rob Stein/NPR

Clinic Claims Success In Making Babies With 3 Parents' DNA

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Mitochondrial diseases can be passed from mothers to their children in DNA. JGI/Tom Grill/Getty Images/Blend Images hide caption

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JGI/Tom Grill/Getty Images/Blend Images

The genes in mitochondria, which are the powerhouses in human cells, can cause fatal inherited disease. But replacing the bad genes may cause other health problems. Getty Images/Science Photo Library hide caption

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Getty Images/Science Photo Library