A medical first that some people will consider it cutting-edge, while others will find it creepy.
Scientists say the first baby with three parents has been born, using a controversial fertility technique.
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Part of the mother's DNA was removed and put into a donor egg from a second woman which was then fertilized with the father's DNA.
The procedure was done in Mexico by American doctors because it is not currently legal in the United States.
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The purpose was to prevent the baby boy from inheriting a fatal genetic disease from his mother.