"Making medical history."

The world's first "three-person" baby has been born in Greece. The infant was conceived using the DNA of three different people in a groundbreaking experimental form of IVF treatment. The baby, weighing 6lbs, was born on Tuesday. Both mother and child are said to be doing well. BBC News reports that fertility specialists in Greece and Spain included the DNA of three people to combat fertility issues in couples around the world. The egg from the mother and sperm from the father were joined by another woman's donor egg in an attempt to reduce the chance of mitochondrial diseases affecting couples struggling to get pregnant. President of the Institute of Life in Athens, Dr Panagiotis Psathas, said:

"A woman's inalienable right to become a mother with her own genetic material became a reality. "We are very proud to announce an international innovation in assisted reproduction, and we are now in a position to make it possible for women with multiple IVF failures or rare mitochondrial genetic diseases to have a healthy child."

Although the doctors have said they are "making medical history," the treatment has also been the subject of questions around the ethics of such procedures. Some critics have suggested that it may not have been necessary to include a third person's DNA and that the woman may have become pregnant following another round of IVF. The mother of the "three-person" baby is a 32-year-old woman from Greece. She had undergone four unsuccessful cycles of IVF before having this treatment.